Common Weakness Enumeration

CWE-59

Allowed

Improper Link Resolution Before File Access ('Link Following')

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

2320 vulnerabilities reference this CWE, most recent first.

GHSA-VXF7-JPG6-XH49

Vulnerability from github – Published: 2022-05-24 17:44 – Updated: 2022-05-24 17:44
VLAI
Details

Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares. This can lead to code execution and information disclosure (by reading local files).

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{
  "affected": [],
  "aliases": [
    "CVE-2021-3310"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-03-10T05:15:00Z",
    "severity": "HIGH"
  },
  "details": "Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares. This can lead to code execution and information disclosure (by reading local files).",
  "id": "GHSA-vxf7-jpg6-xh49",
  "modified": "2022-05-24T17:44:14Z",
  "published": "2022-05-24T17:44:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3310"
    },
    {
      "type": "WEB",
      "url": "https://www.westerndigital.com/support/productsecurity/wdc-21002-my-cloud-firmware-version-5-10-122"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-277"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-VXWX-PGMH-62GG

Vulnerability from github – Published: 2022-05-17 05:53 – Updated: 2022-05-17 05:53
VLAI
Details

mail2sms.sh in smsclient 2.0.8z allows local users to overwrite arbitrary files via a symlink attack on a (1) /tmp/header.##### or (2) /tmp/body.##### temporary file, or append data to arbitrary files via a symlink attack on the (3) /tmp/sms.log temporary file.

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{
  "affected": [],
  "aliases": [
    "CVE-2008-5155"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-11-18T16:00:00Z",
    "severity": "HIGH"
  },
  "details": "mail2sms.sh in smsclient 2.0.8z allows local users to overwrite arbitrary files via a symlink attack on a (1) /tmp/header.##### or (2) /tmp/body.##### temporary file, or append data to arbitrary files via a symlink attack on the (3) /tmp/sms.log temporary file.",
  "id": "GHSA-vxwx-pgmh-62gg",
  "modified": "2022-05-17T05:53:08Z",
  "published": "2022-05-17T05:53:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-5155"
    },
    {
      "type": "WEB",
      "url": "http://lists.debian.org/debian-devel/2008/08/msg00347.html"
    },
    {
      "type": "WEB",
      "url": "http://uvw.ru/report.sid.txt"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/32405"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-W24Q-F35X-3G4M

Vulnerability from github – Published: 2022-05-24 17:07 – Updated: 2022-11-10 12:01
VLAI
Details

A Symbolic Link (Symlink) Following vulnerability in the packaging of munin in openSUSE Factory, Leap 15.1 allows local attackers to escalate from user munin to root. This issue affects: openSUSE Factory munin version 2.0.49-4.2 and prior versions. openSUSE Leap 15.1 munin version 2.0.40-lp151.1.1 and prior versions.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2019-3694"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-01-24T11:15:00Z",
    "severity": "HIGH"
  },
  "details": "A Symbolic Link (Symlink) Following vulnerability in the packaging of munin in openSUSE Factory, Leap 15.1 allows local attackers to escalate from user munin to root. This issue affects: openSUSE Factory munin version 2.0.49-4.2 and prior versions. openSUSE Leap 15.1 munin version 2.0.40-lp151.1.1 and prior versions.",
  "id": "GHSA-w24q-f35x-3g4m",
  "modified": "2022-11-10T12:01:04Z",
  "published": "2022-05-24T17:07:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-3694"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1155078"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W2WR-58MM-R5PH

Vulnerability from github – Published: 2024-07-30 00:34 – Updated: 2024-07-30 00:34
VLAI
Details

Comodo Internet Security Pro cmdagent Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Comodo Internet Security Pro. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the cmdagent executable. By creating a symbolic link, an attacker can abuse the agent to create a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-22832.

Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2024-7251"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-29T22:15:06Z",
    "severity": "HIGH"
  },
  "details": "Comodo Internet Security Pro cmdagent Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Comodo Internet Security Pro. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.\n\nThe specific flaw exists within the cmdagent executable. By creating a symbolic link, an attacker can abuse the agent to create a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-22832.",
  "id": "GHSA-w2wr-58mm-r5ph",
  "modified": "2024-07-30T00:34:24Z",
  "published": "2024-07-30T00:34:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7251"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-24-956"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W2X9-VQWG-9G25

Vulnerability from github – Published: 2026-07-21 21:32 – Updated: 2026-07-23 15:30
VLAI
Details

Data::Graph::Shared versions before 0.04 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.

The segment is created in graph.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing.

A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.

Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-64615"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T20:17:04Z",
    "severity": "LOW"
  },
  "details": "Data::Graph::Shared versions before 0.04 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.\n\nThe segment is created in graph.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing.\n\nA \"Shared\" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.",
  "id": "GHSA-w2x9-vqwg-9g25",
  "modified": "2026-07-23T15:30:35Z",
  "published": "2026-07-21T21:32:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64615"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/EGOR/Data-Graph-Shared-0.04/changes"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/EGOR/Data-Graph-Shared-0.04/diff/EGOR/Data-Graph-Shared-0.03#graph.h"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W39P-QMCM-PXPM

Vulnerability from github – Published: 2022-05-24 16:44 – Updated: 2024-04-04 00:04
VLAI
Details

snap-confine as included in snapd before 2.39 did not guard against symlink races when performing the chdir() to the current working directory of the calling user, aka a "cwd restore permission bypass."

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2019-11503"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-04-24T21:29:00Z",
    "severity": "HIGH"
  },
  "details": "snap-confine as included in snapd before 2.39 did not guard against symlink races when performing the chdir() to the current working directory of the calling user, aka a \"cwd restore permission bypass.\"",
  "id": "GHSA-w39p-qmcm-pxpm",
  "modified": "2024-04-04T00:04:43Z",
  "published": "2022-05-24T16:44:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-11503"
    },
    {
      "type": "WEB",
      "url": "https://github.com/snapcore/snapd/pull/6642"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6VACEKVQ7UAZ32WO4ZKCFW6YOBSYJ76L"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VPU6APEZHAA7N2AI57OT4J2P7NKHFOLM"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2019/04/18/4"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2019/04/25/7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W3CX-68MP-RWCW

Vulnerability from github – Published: 2025-06-03 12:30 – Updated: 2025-06-03 12:30
VLAI
Details

A privilege escalation vulnerability exists in the virtual machine archive restoration functionality of Parallels Desktop for Mac version 20.1.1 (55740). When an archived virtual machine is restored, the prl_vmarchiver tool decompresses the file and writes the content back to its original location using root privileges. An attacker can exploit this process by using a hard link to write to an arbitrary file, potentially resulting in privilege escalation.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-36486"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59",
      "CWE-62"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-03T10:15:20Z",
    "severity": "HIGH"
  },
  "details": "A privilege escalation vulnerability exists in the virtual machine archive restoration functionality of Parallels Desktop for Mac version 20.1.1 (55740). When an archived virtual machine is restored, the prl_vmarchiver tool decompresses the file and writes the content back to its original location using root privileges. An attacker can exploit this process by using a hard link to write to an arbitrary file, potentially resulting in privilege escalation.",
  "id": "GHSA-w3cx-68mp-rwcw",
  "modified": "2025-06-03T12:30:30Z",
  "published": "2025-06-03T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36486"
    },
    {
      "type": "WEB",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2024-2126"
    },
    {
      "type": "WEB",
      "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-2126"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W3Q9-FXM7-J8FQ

Vulnerability from github – Published: 2025-10-15 17:28 – Updated: 2025-10-27 20:17
VLAI
Summary
Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability
Details

Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0.xxx, .NET 9.0.xxx and .NET 10.0.xxx. This advisory also provides guidance on what developers can do to update their environments to remove this vulnerability.

A vulnerability exists in .NET where predictable paths for MSBuild's temporary directories on Linux let another user create the directories ahead of MSBuild, leading to DoS of builds. This only affects .NET on Linux operating systems.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/370

Mitigation factors

Projects which do not utilize the DownloadFile build task are not susceptible to this vulnerability.

Affected software

  • Any installation of .NET 10.0.100-rc.1.25451.107 SDK or earlier.
  • Any installation of .NET 9.0.110 SDK, .NET 9.0.305 SDK or earlier.
  • Any installation of .NET 8.0.120 SDK, .NET 8.0.317 SDK, .NET 8.0.414 SDK or earlier.

Affected Packages

The vulnerability affects any Microsoft .NET Core project if it uses any of affected packages versions listed below

Package name Affected version Patched version
Microsoft.Build.Tasks.Core 17.15.0-preview-25277-114
>=17.14.0, <= 17.14.8
>= 17.12.0, <= 17.12.36
>= 17.11.0, <= 17.11.31
>= 17.10.0, <= 17.10.29
>= 17.8.0, <= 17.8.29
18.0.0-preview-25476-107
17.14.28
17.12.50
17.11.48
17.10.46
17.8.43
Package name Affected version Patched version
Microsoft.Build 17.15.0-preview-25277-114
>=17.14.0, <= 17.14.8
>= 17.12.0, <= 17.12.36
>= 17.11.0, <= 17.11.31
>= 17.10.0, <= 17.10.29
>= 17.8.0, <= 17.8.29
18.0.0-preview-25476-107
17.14.28
17.12.50
17.11.48
17.10.46
17.8.43
Package name Affected version Patched version
Microsoft.Build.Utilities.core 17.15.0-preview-25277-114
>=17.14.0, <= 17.14.8
>= 17.12.0, <= 17.12.36
>= 17.11.0, <= 17.11.31
>= 17.10.0, <= 17.10.29
>= 17.8.0, <= 17.8.29
18.0.0-preview-25476-107
17.14.28
17.12.50
17.11.48
17.10.46
17.8.43

Advisory FAQ

How do I know if I am affected?

If you have a .NET SDK with a version listed, or an affected package listed in affected software or affected packages, you're exposed to the vulnerability.

How do I fix the issue?

  1. To fix the issue please install the latest version of .NET 10.0 SDK, .NET 9.0 SDK or .NET 8.0 SDK. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.

  2. If your application references the vulnerable package, update the package reference to the patched version.

  3. You can list the versions you have installed by running the dotnet --info command. You will see output like the following;

.NET SDK:
 Version:           9.0.100
 Commit:            59db016f11
 Workload version:  9.0.100-manifests.3068a692
 MSBuild version:   17.12.7+5b8665660

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  15.2
 OS Platform: Darwin
 RID:         osx-arm64
 Base Path:   /usr/local/share/dotnet/sdk/9.0.100/

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
  Version:      9.0.0
  Architecture: arm64
  Commit:       9d5a6a9aa4

.NET SDKs installed:
  9.0.100 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 9.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 9.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  x64   [/usr/local/share/dotnet]
    registered at [/etc/dotnet/install_location_x64]

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

  • If you're using .NET 10.0, you should download and install the appropriate SDK: .NET 10.0.100-rc.2.25502.107 for Visual Studio 2026 v18 Preview 3. Download from https://dotnet.microsoft.com/download/dotnet-core/10.0.

  • If you're using .NET 9.0, you should download and install the appropriate SDK: .NET 9.0.306 for Visual Studio 2022 v17.14 or .NET 9.0.111 for v17.12. Download from https://dotnet.microsoft.com/download/dotnet-core/9.0.

  • If you're using .NET 8.0, you should download and install the appropriate SDK: .NET 8.0.415 for Visual Studio 2022 v17.11, .NET 8.0.318 for v17.10, or .NET 8.0.121 for v17.8. Download from https://dotnet.microsoft.com/download/dotnet-core/8.0.

Once you have installed the updated SDK, restart your apps for the update to take effect.

Other Information

Reporting Security Issues

If you have found a potential security issue in .NET 8.0, .NET 9.0 or .NET 10.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core & .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.

Support

You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.

Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

External Links

CVE-2025-55247

Revisions

V1.0 (October 14, 2025): Advisory published.

Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Tasks.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.15.0-preview-25277-114"
            },
            {
              "fixed": "18.0.0-preview-25476-107"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "17.15.0-preview-25277-114"
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.14.8"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Tasks.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.14.0"
            },
            {
              "fixed": "17.14.28"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.12.36"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Tasks.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.12.0"
            },
            {
              "fixed": "17.12.50"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.11.31"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Tasks.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.11.0"
            },
            {
              "fixed": "17.11.48"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.10.29"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Tasks.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.10.0"
            },
            {
              "fixed": "17.10.46"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.8.29"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Tasks.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.8.0"
            },
            {
              "fixed": "17.8.43"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.15.0-preview-25277-114"
            },
            {
              "fixed": "18.0.0-preview-25476-107"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "17.15.0-preview-25277-114"
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.14.8"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.14.0"
            },
            {
              "fixed": "17.14.28"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.12.36"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.12.0"
            },
            {
              "fixed": "17.12.50"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.11.31"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.11.0"
            },
            {
              "fixed": "17.11.48"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.10.29"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.10.0"
            },
            {
              "fixed": "17.10.46"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.8.29"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.8.0"
            },
            {
              "fixed": "17.8.43"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Utilities.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.15.0-preview-25277-114"
            },
            {
              "fixed": "18.0.0-preview-25476-107"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "17.15.0-preview-25277-114"
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.14.8"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Utilities.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.14.0"
            },
            {
              "fixed": "17.14.28"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.12.36"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Utilities.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.12.0"
            },
            {
              "fixed": "17.12.50"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.11.31"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Utilities.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.11.0"
            },
            {
              "fixed": "17.11.48"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.10.29"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Utilities.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.10.0"
            },
            {
              "fixed": "17.10.46"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 17.8.29"
      },
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Build.Utilities.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.8.0"
            },
            {
              "fixed": "17.8.43"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-55247"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-15T17:28:15Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "# Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability\n\n## \u003ca name=\"executive-summary\"\u003e\u003c/a\u003eExecutive summary\n\nMicrosoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0.xxx, .NET 9.0.xxx and .NET 10.0.xxx. This advisory also provides guidance on what developers can do to update their environments to remove this vulnerability.\n\nA vulnerability exists in .NET where predictable paths for MSBuild\u0027s temporary directories on Linux let another user create the directories ahead of MSBuild, leading to DoS of builds. This only affects .NET on Linux operating systems.\n\n## Announcement\n\nAnnouncement for this issue can be found at  https://github.com/dotnet/announcements/issues/370\n\n### \u003ca name=\"mitigation-factors\"\u003e\u003c/a\u003eMitigation factors\n\nProjects which do not utilize the [DownloadFile](https://learn.microsoft.com/visualstudio/msbuild/downloadfile-task)  build task are not susceptible to this vulnerability.\n\n## \u003ca name=\"affected-software\"\u003e\u003c/a\u003eAffected software\n\n* Any installation of .NET 10.0.100-rc.1.25451.107 SDK or earlier.\n* Any installation of .NET 9.0.110 SDK, .NET 9.0.305 SDK or earlier.\n* Any installation of .NET 8.0.120 SDK, .NET 8.0.317 SDK, .NET 8.0.414 SDK or earlier.\n\n## \u003ca name=\"affected-packages\"\u003e\u003c/a\u003eAffected Packages\n\nThe vulnerability affects any Microsoft .NET Core project if it uses any of affected packages versions listed below\n\nPackage name |Affected version | Patched version\n------------ |---------------- | -------------------------\n[Microsoft.Build.Tasks.Core](https://www.nuget.org/packages/Microsoft.Build.Tasks.Core) | 17.15.0-preview-25277-114 \u003cbr /\u003e\u003e=17.14.0, \u003c= 17.14.8 \u003cbr /\u003e\u003e= 17.12.0, \u003c= 17.12.36 \u003cbr/\u003e \u003e= 17.11.0, \u003c= 17.11.31\u003cbr /\u003e  \u003e= 17.10.0, \u003c= 17.10.29 \u003cbr /\u003e  \u003e= 17.8.0, \u003c= 17.8.29 \u003cbr /\u003e | 18.0.0-preview-25476-107 \u003cbr /\u003e17.14.28 \u003cbr /\u003e17.12.50 \u003cbr/\u003e17.11.48 \u003cbr /\u003e17.10.46 \u003cbr /\u003e17.8.43 \u003cbr /\u003e\n\n\nPackage name|Affected version | Patched version\n------------ |---------------|----------------\n[Microsoft.Build](https://www.nuget.org/packages/Microsoft.Build) | 17.15.0-preview-25277-114 \u003cbr /\u003e\u003e=17.14.0, \u003c= 17.14.8 \u003cbr /\u003e\u003e= 17.12.0, \u003c= 17.12.36 \u003cbr/\u003e \u003e= 17.11.0, \u003c= 17.11.31\u003cbr /\u003e  \u003e= 17.10.0, \u003c= 17.10.29 \u003cbr /\u003e  \u003e= 17.8.0, \u003c= 17.8.29 \u003cbr /\u003e | 18.0.0-preview-25476-107 \u003cbr /\u003e17.14.28 \u003cbr /\u003e17.12.50 \u003cbr/\u003e17.11.48 \u003cbr /\u003e17.10.46 \u003cbr /\u003e17.8.43 \u003cbr /\u003e\n\nPackage name  |Affected version | Patched version\n------------ |---------------|----------------\n[Microsoft.Build.Utilities.core](https://www.nuget.org/packages/Microsoft.Build.Utilities.Core/17.15.0-preview-25277-114)| 17.15.0-preview-25277-114 \u003cbr /\u003e\u003e=17.14.0, \u003c= 17.14.8 \u003cbr /\u003e\u003e= 17.12.0, \u003c= 17.12.36 \u003cbr/\u003e \u003e= 17.11.0, \u003c= 17.11.31\u003cbr /\u003e  \u003e= 17.10.0, \u003c= 17.10.29 \u003cbr /\u003e  \u003e= 17.8.0, \u003c= 17.8.29 \u003cbr /\u003e | 18.0.0-preview-25476-107 \u003cbr /\u003e17.14.28 \u003cbr /\u003e17.12.50 \u003cbr/\u003e17.11.48 \u003cbr /\u003e17.10.46 \u003cbr /\u003e17.8.43 \u003cbr /\u003e\n\n## Advisory FAQ\n\n### \u003ca name=\"how-affected\"\u003e\u003c/a\u003eHow do I know if I am affected?\n\nIf you have a .NET SDK with a version listed, or an affected package listed in [affected software](#affected-packages) or [affected packages](#affected-software), you\u0027re exposed to the vulnerability.\n\n### \u003ca name=\"how-fix\"\u003e\u003c/a\u003eHow do I fix the issue?\n\n1. To fix the issue please install the latest version of .NET 10.0 SDK, .NET 9.0 SDK or .NET 8.0 SDK. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET  SDKs.\n2. If your application references the vulnerable package, update the package reference to the patched version.\n\n* You can list the versions you have installed by running the `dotnet --info` command. You will see output like the following;\n\n```\n.NET SDK:\n Version:           9.0.100\n Commit:            59db016f11\n Workload version:  9.0.100-manifests.3068a692\n MSBuild version:   17.12.7+5b8665660\n\nRuntime Environment:\n OS Name:     Mac OS X\n OS Version:  15.2\n OS Platform: Darwin\n RID:         osx-arm64\n Base Path:   /usr/local/share/dotnet/sdk/9.0.100/\n\n.NET workloads installed:\nThere are no installed workloads to display.\nConfigured to use loose manifests when installing new manifests.\n\nHost:\n  Version:      9.0.0\n  Architecture: arm64\n  Commit:       9d5a6a9aa4\n\n.NET SDKs installed:\n  9.0.100 [/usr/local/share/dotnet/sdk]\n\n.NET runtimes installed:\n  Microsoft.AspNetCore.App 9.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]\n  Microsoft.NETCore.App 9.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]\n\nOther architectures found:\n  x64   [/usr/local/share/dotnet]\n    registered at [/etc/dotnet/install_location_x64]\n\nEnvironment variables:\n  Not set\n\nglobal.json file:\n  Not found\n\nLearn more:\n  https://aka.ms/dotnet/info\n\nDownload .NET:\n  https://aka.ms/dotnet/download\n```\n\n* If you\u0027re using .NET 10.0, you should download and install the appropriate SDK: `.NET 10.0.100-rc.2.25502.107` for Visual Studio 2026 v18 Preview 3. Download from https://dotnet.microsoft.com/download/dotnet-core/10.0.\n\n* If you\u0027re using .NET 9.0, you should download and install the appropriate SDK: `.NET 9.0.306` for Visual Studio 2022 v17.14 or `.NET 9.0.111` for v17.12. Download from https://dotnet.microsoft.com/download/dotnet-core/9.0.\n\n* If you\u0027re using .NET 8.0, you should download and install the appropriate SDK: `.NET 8.0.415` for Visual Studio 2022 v17.11, `.NET 8.0.318` for v17.10, or `.NET 8.0.121` for v17.8. Download from https://dotnet.microsoft.com/download/dotnet-core/8.0.\n\nOnce you have installed the updated SDK, restart your apps for the update to take effect.\n\n## Other Information\n\n### Reporting Security Issues\n\nIf you have found a potential security issue in .NET 8.0, .NET 9.0 or .NET 10.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core \u0026 .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at \u003chttps://aka.ms/corebounty\u003e.\n\n### Support\n\nYou can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.\n\n### Disclaimer\n\nThe information provided in this advisory is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.\n\n### External Links\n\n[CVE-2025-55247]( https://www.cve.org/CVERecord?id=CVE-2025-55247)\n\n### Revisions\n\nV1.0 (October 14, 2025): Advisory published.",
  "id": "GHSA-w3q9-fxm7-j8fq",
  "modified": "2025-10-27T20:17:30Z",
  "published": "2025-10-15T17:28:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/dotnet/msbuild/security/advisories/GHSA-w3q9-fxm7-j8fq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-55247"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dotnet/msbuild"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55247"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Microsoft Security Advisory CVE-2025-55247 | .NET Denial of Service Vulnerability"
}

GHSA-W3VW-Q5H9-GX9G

Vulnerability from github – Published: 2026-07-21 21:32 – Updated: 2026-07-23 15:30
VLAI
Details

Data::PubSub::Shared versions before 0.07 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.

The segment is created in pubsub.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing.

A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.

Severity
3.8 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-64617"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T20:17:04Z",
    "severity": "LOW"
  },
  "details": "Data::PubSub::Shared versions before 0.07 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.\n\nThe segment is created in pubsub.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing.\n\nA \"Shared\" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.",
  "id": "GHSA-w3vw-q5h9-gx9g",
  "modified": "2026-07-23T15:30:35Z",
  "published": "2026-07-21T21:32:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64617"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/EGOR/Data-PubSub-Shared-0.07/changes"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/EGOR/Data-PubSub-Shared-0.07/diff/EGOR/Data-PubSub-Shared-0.06#pubsub.h"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-W3VX-X8FJ-R29M

Vulnerability from github – Published: 2026-03-05 15:30 – Updated: 2026-04-01 15:30
VLAI
Details

Avira Internet Security contains an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\ProgramData without validating whether the path resolves through a symbolic link or reparse point. A local attacker can create a malicious link to redirect the delete operation to an arbitrary file, resulting in deletion of attacker-chosen files with SYSTEM privileges. This may lead to local privilege escalation, denial of service, or system integrity compromise depending on the targeted file and operating system configuration.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-27748"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-05T15:16:11Z",
    "severity": "HIGH"
  },
  "details": "Avira Internet Security contains an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\\\\ProgramData without validating whether the path resolves through a symbolic link or reparse point. A local attacker can create a malicious link to redirect the delete operation to an arbitrary file, resulting in deletion of attacker-chosen files with SYSTEM privileges. This may lead to local privilege escalation, denial of service, or system integrity compromise depending on the targeted file and operating system configuration.",
  "id": "GHSA-w3vx-x8fj-r29m",
  "modified": "2026-04-01T15:30:56Z",
  "published": "2026-03-05T15:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27748"
    },
    {
      "type": "WEB",
      "url": "https://blog.quarkslab.com/avira-deserialize-delete-and-escalate-the-proper-way-to-use-an-av.html"
    },
    {
      "type": "WEB",
      "url": "https://support.avira.com/hc/en-us/articles/360010656158-Current-Avira-versions"
    },
    {
      "type": "WEB",
      "url": "https://www.avira.com/en/internet-security"
    },
    {
      "type": "WEB",
      "url": "https://www.gendigital.com/us/en/contact-us/security-advisories"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/avira-internet-security-arbitrary-file-deletion-via-improper-link-resolution"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}
Mitigation MIT-48.1
Architecture and Design

Strategy: Separation of Privilege

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
CAPEC-132: Symlink Attack

An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.

CAPEC-17: Using Malicious Files

An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.

CAPEC-35: Leverage Executable Code in Non-Executable Files

An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.

CAPEC-76: Manipulating Web Input to File System Calls

An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

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