Common Weakness Enumeration

CWE-296

Allowed

Improper Following of a Certificate's Chain of Trust

Abstraction: Base · Status: Draft

The product does not follow, or incorrectly follows, the chain of trust for a certificate back to a trusted root certificate.

32 vulnerabilities reference this CWE, most recent first.

GHSA-MQV2-J79J-4GQF

Vulnerability from github – Published: 2021-11-19 00:00 – Updated: 2024-02-27 18:44
VLAI
Details

Improper validation of the cloud certificate chain in Mobile Client allows man-in-the-middle attack to impersonate the legitimate Command Centre Server. This issue affects: Gallagher Command Centre Mobile Client for Android 8.60 versions prior to 8.60.065; version 8.50 and prior versions.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-23155"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295",
      "CWE-296"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-11-18T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Improper validation of the cloud certificate chain in Mobile Client allows man-in-the-middle attack to impersonate the legitimate Command Centre Server. This issue affects: Gallagher Command Centre Mobile Client for Android 8.60 versions prior to 8.60.065; version 8.50 and prior versions.",
  "id": "GHSA-mqv2-j79j-4gqf",
  "modified": "2024-02-27T18:44:57Z",
  "published": "2021-11-19T00:00:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-23155"
    },
    {
      "type": "WEB",
      "url": "https://security.gallagher.com/Security-Advisories/CVE-2021-23155"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-MW8V-5VG6-VWX7

Vulnerability from github – Published: 2026-08-20 06:32 – Updated: 2026-08-20 06:32
VLAI
Details

Multiple SEIKO EPSON printers and scanners contain revoked root certificates. A man-in-the-middle attack may allow an attacker to obtain communication data transmitted by the product. As for the details of the affected products and versions, refer to the vendor's information.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-73542"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-296"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-20T06:17:13Z",
    "severity": "MODERATE"
  },
  "details": "Multiple SEIKO EPSON printers and scanners contain revoked root certificates. A man-in-the-middle attack may allow an attacker to obtain communication data transmitted by the product. As for the details of the affected products and versions, refer to the vendor\u0027s information.",
  "id": "GHSA-mw8v-5vg6-vwx7",
  "modified": "2026-08-20T06:32:27Z",
  "published": "2026-08-20T06:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73542"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/vu/JVNVU91609598"
    },
    {
      "type": "WEB",
      "url": "https://www.epson.jp/news/info/a-security202608.htm"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/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
Architecture and Design

Ensure that proper certificate checking is included in the system design.

Mitigation
Implementation

Understand, and properly implement all checks necessary to ensure the integrity of certificate trust integrity.

Mitigation
Implementation

If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the full chain of trust.

No CAPEC attack patterns related to this CWE.