{
  "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-2026-20135",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-20135",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-16T20:12:09.389Z",
    "updatedAt": "2026-09-17T13:40:57.832Z",
    "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 Firewall Threat Defense Software TLS 1.3 Denial of Service Vulnerability",
      "summary": "A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note: TLS 1.3 connections include both data traffic and user-management traffic.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "7.0.0",
              "status": "affected"
            },
            {
              "version": "7.0.0.1",
              "status": "affected"
            },
            {
              "version": "7.0.1",
              "status": "affected"
            },
            {
              "version": "7.0.1.1",
              "status": "affected"
            },
            {
              "version": "7.0.2",
              "status": "affected"
            },
            {
              "version": "7.2.0",
              "status": "affected"
            },
            {
              "version": "7.0.2.1",
              "status": "affected"
            },
            {
              "version": "7.0.3",
              "status": "affected"
            },
            {
              "version": "7.2.0.1",
              "status": "affected"
            },
            {
              "version": "7.0.4",
              "status": "affected"
            },
            {
              "version": "7.2.1",
              "status": "affected"
            },
            {
              "version": "7.0.5",
              "status": "affected"
            },
            {
              "version": "7.3.0",
              "status": "affected"
            },
            {
              "version": "7.2.2",
              "status": "affected"
            },
            {
              "version": "7.2.3",
              "status": "affected"
            },
            {
              "version": "7.3.1",
              "status": "affected"
            },
            {
              "version": "7.2.4",
              "status": "affected"
            },
            {
              "version": "7.0.6",
              "status": "affected"
            },
            {
              "version": "7.2.5",
              "status": "affected"
            },
            {
              "version": "7.2.4.1",
              "status": "affected"
            },
            {
              "version": "7.3.1.1",
              "status": "affected"
            },
            {
              "version": "7.4.0",
              "status": "affected"
            },
            {
              "version": "7.0.6.1",
              "status": "affected"
            },
            {
              "version": "7.2.5.1",
              "status": "affected"
            },
            {
              "version": "7.4.1",
              "status": "affected"
            },
            {
              "version": "7.2.6",
              "status": "affected"
            },
            {
              "version": "7.0.6.2",
              "status": "affected"
            },
            {
              "version": "7.4.1.1",
              "status": "affected"
            },
            {
              "version": "7.2.7",
              "status": "affected"
            },
            {
              "version": "7.2.5.2",
              "status": "affected"
            },
            {
              "version": "7.3.1.2",
              "status": "affected"
            },
            {
              "version": "7.2.8",
              "status": "affected"
            },
            {
              "version": "7.6.0",
              "status": "affected"
            },
            {
              "version": "7.4.2",
              "status": "affected"
            },
            {
              "version": "7.2.8.1",
              "status": "affected"
            },
            {
              "version": "7.0.6.3",
              "status": "affected"
            },
            {
              "version": "7.4.2.1",
              "status": "affected"
            },
            {
              "version": "7.2.9",
              "status": "affected"
            },
            {
              "version": "7.0.7",
              "status": "affected"
            },
            {
              "version": "7.7.0",
              "status": "affected"
            },
            {
              "version": "7.4.2.2",
              "status": "affected"
            },
            {
              "version": "7.2.10",
              "status": "affected"
            },
            {
              "version": "7.6.1",
              "status": "affected"
            },
            {
              "version": "7.4.2.3",
              "status": "affected"
            },
            {
              "version": "7.0.8",
              "status": "affected"
            },
            {
              "version": "7.6.2",
              "status": "affected"
            },
            {
              "version": "7.7.10",
              "status": "affected"
            },
            {
              "version": "7.7.11",
              "status": "affected"
            },
            {
              "version": "7.0.8.1",
              "status": "affected"
            },
            {
              "version": "7.6.2.1",
              "status": "affected"
            },
            {
              "version": "7.7.10.1",
              "status": "affected"
            },
            {
              "version": "7.4.2.4",
              "status": "affected"
            },
            {
              "version": "7.2.10.2",
              "status": "affected"
            },
            {
              "version": "7.4.3",
              "status": "affected"
            },
            {
              "version": "7.6.4",
              "status": "affected"
            },
            {
              "version": "7.4.4",
              "status": "affected"
            },
            {
              "version": "7.0.9",
              "status": "affected"
            },
            {
              "version": "7.2.11",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}