{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-20355",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-20355",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-02T16:14:32.732Z",
    "updatedAt": "2026-09-08T16:04:40.505Z",
    "importedAt": "2026-10-24T01:57:55.771Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Cisco Secure Email S/MIME Ciphertext Decryption Vulnerabilty",
      "summary": "Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions (S/MIME) decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages.\r\n\r\nThese vulnerabilities are due to insufficient validation of message integrity. An attacker could exploit these vulnerabilities by using a machine-in-the-middle technique to intercept and modify traffic between email gateways. A successful exploit could allow the attacker to obtain plaintext content from the encrypted communication.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco Secure Email",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "14.0.0-698",
              "status": "affected"
            },
            {
              "version": "13.5.1-277",
              "status": "affected"
            },
            {
              "version": "13.0.0-392",
              "status": "affected"
            },
            {
              "version": "14.2.0-620",
              "status": "affected"
            },
            {
              "version": "13.0.5-007",
              "status": "affected"
            },
            {
              "version": "13.5.4-038",
              "status": "affected"
            },
            {
              "version": "14.2.1-020",
              "status": "affected"
            },
            {
              "version": "14.3.0-032",
              "status": "affected"
            },
            {
              "version": "15.0.0-104",
              "status": "affected"
            },
            {
              "version": "15.0.1-030",
              "status": "affected"
            },
            {
              "version": "15.5.0-048",
              "status": "affected"
            },
            {
              "version": "15.5.1-055",
              "status": "affected"
            },
            {
              "version": "15.5.2-018",
              "status": "affected"
            },
            {
              "version": "16.0.0-050",
              "status": "affected"
            },
            {
              "version": "15.0.3-002",
              "status": "affected"
            },
            {
              "version": "16.0.0-054",
              "status": "affected"
            },
            {
              "version": "15.5.3-022",
              "status": "affected"
            },
            {
              "version": "16.0.1-017",
              "status": "affected"
            },
            {
              "version": "15.5.4-012",
              "status": "affected"
            },
            {
              "version": "16.0.4-016",
              "status": "affected"
            },
            {
              "version": "15.0.5-016",
              "status": "affected"
            },
            {
              "version": "16.0.2-112",
              "status": "affected"
            },
            {
              "version": "16.0.3-044",
              "status": "affected"
            },
            {
              "version": "16.5.0-780",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}