Common Weakness Enumeration

CWE-121

Allowed

Stack-based Buffer Overflow

Abstraction: Variant · Status: Draft

API response cwe.mitre.org

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

5785 vulnerabilities reference this CWE, most recent first.

CVE-2026-81738 (GCVE-0-2026-81738)

Vulnerability from cvelistv5 – Published: 2026-09-07 07:32 – Updated: 2026-09-08 14:55
VLAI
Summary
OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:54 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
OpenVPN OpenVPN Affected: 2.5.0 , ≤ 2.7.6 (semver)
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CVE-2026-81546 (GCVE-0-2026-81546)

Vulnerability from cvelistv5 – Published: 2026-09-17 01:39 – Updated: 2026-09-17 13:02
VLAI
Summary
The Affinity by Canva application before 3.3.0 (September 2026 release) did not perform adequate bounds checking when parsing Affinity document files leading to a stack-based buffer overflow. A threat actor could craft a Affinity document that when opened by a user in Affinity could result in arbitrary code execution.
Severity
7.7 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 13:02 UTC
CWE
  • CWE-121 - Stack-based buffer overflow
Assigner
References
Impacted products
Vendor Product Version
Canva Affinity Affected: 0 , < 3.3.0 (semver)
    cpe:2.3:a:canva:affinity:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Angus Cornall (Canva)
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CVE-2026-81533 (GCVE-0-2026-81533)

Vulnerability from cvelistv5 – Published: 2026-08-28 20:28 – Updated: 2026-08-31 18:35
VLAI
Title
MongoDB BI Connector ODBC Driver Memory-Safety Issue When Parsing Oversized LIMIT Values
Summary
An application using the MongoDB BI Connector ODBC Driver may encounter a memory-safety issue when a submitted SQL statement contains an unusually long run of digits following a LIMIT clause. The issue occurs only on connections where the driver's optional prefetch setting is enabled, and stems from the driver copying the digit sequence into a fixed-size internal buffer without checking its length. A user able to influence the numeric portion of a LIMIT clause could cause the hosting application process to terminate unexpectedly or corrupt adjacent memory in that process.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:35 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
MongoDB BI Connector ODBC Driver Affected: 0 , < 1.4.10 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-81532 (GCVE-0-2026-81532)

Vulnerability from cvelistv5 – Published: 2026-08-28 20:26 – Updated: 2026-08-31 18:35
VLAI
Title
BI Connector ODBC Driver Improper Bounds Checking on Cursor Name Leading to Memory Corruption
Summary
A user able to submit SQL through an application using the MongoDB Connector for BI ODBC driver can supply a positioned-cursor statement whose cursor name exceeds the size of an internal fixed-length buffer. Because the name length is not bounded before the driver builds its diagnostic message, memory adjacent to that buffer is overwritten with user-supplied content. This can terminate the hosting application process and may allow unintended code to run within it.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:35 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
MongoDB BI Connector ODBC Driver Affected: 0 , < 1.4.10 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-81480 (GCVE-0-2026-81480)

Vulnerability from cvelistv5 – Published: 2026-09-17 12:05 – Updated: 2026-09-18 03:55
VLAI
Summary
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains a Stack-based Buffer Overflow vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Code execution.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 00:00 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-09-08 06:30
Show details on NVD website
To clipboard 

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CVE-2026-81433 (GCVE-0-2026-81433)

Vulnerability from cvelistv5 – Published: 2026-09-29 23:05 – Updated: 2026-10-01 03:55
VLAI
Title
Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Execution
Summary
A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with adjacent network access to execute arbitrary code or crash the process by sending a specially crafted DHCP packet.
Severity
8.7 (High)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 00:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
WatchGuard Fireware OS Affected: 2026.3 , < 2026.3.2 (custom)
Affected: 2025.0 , < 2026.2.3 (custom)
Affected: 12.0 , < 12.12.3 (custom)
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Create a notification for this product.
Credits
Laurent GAFFIE, (secorizon.com)
Show details on NVD website
To clipboard 

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CVE-2026-81396 (GCVE-0-2026-81396)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:18 – Updated: 2026-10-01 23:00
VLAI
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:19 UTC
CWE
Assigner
References
Impacted products
Date Public
2026-09-08 14:00
Show details on NVD website
To clipboard 

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CVE-2026-81388 (GCVE-0-2026-81388)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:19 – Updated: 2026-10-01 23:00
VLAI
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 04:19 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-09-08 14:00
Show details on NVD website
To clipboard 

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CVE-2026-80147 (GCVE-0-2026-80147)

Vulnerability from cvelistv5 – Published: 2026-09-22 15:20 – Updated: 2026-09-24 19:04
VLAI
Title
Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom write
Summary
Lantronix SLC8000/SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom write command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 16:02 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-09-18 00:00
Credits
RE/VRb
Show details on NVD website
To clipboard 

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CVE-2026-80146 (GCVE-0-2026-80146)

Vulnerability from cvelistv5 – Published: 2026-09-22 15:19 – Updated: 2026-09-25 23:34
VLAI
Title
Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom read
Summary
Lantronix SLC8000/SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom read command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 23:33 UTC
CWE
  • CWE-121 - Stack-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2026-09-18 00:00
Credits
RE/VRb
Show details on NVD website
To clipboard 

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          "product": "EMG7500",
          "vendor": "LANTRONIX",
          "versions": [
            {
              "lessThan": "9.7.0.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SLB882",
          "vendor": "LANTRONIX",
          "versions": [
            {
              "status": "affected",
              "version": "*",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "SLCx-03",
          "vendor": "LANTRONIX",
          "versions": [
            {
              "status": "affected",
              "version": "*",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "SLCx-02",
          "vendor": "LANTRONIX",
          "versions": [
            {
              "status": "affected",
              "version": "*",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "SLC9000",
          "vendor": "LANTRONIX",
          "versions": [
            {
              "lessThan": "9.7.0.2",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "RE/VRb"
        }
      ],
      "datePublic": "2026-09-18T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Lantronix SLC8000/SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom read command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-24T19:03:26.826Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Researcher Disclosure",
          "tags": [
            "technical-description"
          ],
          "url": "https://revrb.net/2026/09/21/revrb-lantern.html"
        },
        {
          "name": "SLC8000 Firmware",
          "tags": [
            "patch"
          ],
          "url": "https://ts.lantronix.com/ftp/slc8000/9.7.0.2R1/"
        },
        {
          "name": "EMG8500 Firmware",
          "tags": [
            "patch"
          ],
          "url": "https://ts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2/"
        },
        {
          "name": "EMG7500 Firmware",
          "tags": [
            "patch"
          ],
          "url": "https://ts.lantronix.com/ftp/emg/EMG_7500/9.7.0.1R2/"
        },
        {
          "name": "SLC9000 Firmware",
          "tags": [
            "patch"
          ],
          "url": "https://ts.lantronix.com/ftp/SLC9000/9.7.0.2R1/"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-stack-based-buffer-overflow-via-mfc-eeprom-read"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom read",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-80146",
    "datePublished": "2026-09-22T15:19:38.818Z",
    "dateReserved": "2026-08-25T20:43:54.261Z",
    "dateUpdated": "2026-09-25T23:34:09.518Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation MIT-10
Operation Build and Compilation

Strategy: Environment Hardening

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Mitigation
Architecture and Design

Use an abstraction library to abstract away risky APIs. Not a complete solution.

Mitigation
Implementation

Implement and perform bounds checking on input.

Mitigation
Implementation

Do not use dangerous functions such as gets. Use safer, equivalent functions which check for boundary errors.

Mitigation MIT-11
Operation Build and Compilation

Strategy: Environment Hardening

  • Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

No CAPEC attack patterns related to this CWE.

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