{
  "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-2026-20074",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-20074",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-11T16:31:14.712Z",
    "updatedAt": "2026-03-11T17:20:21.640Z",
    "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 IOS XR Software Multi-Instance Intermediate System-to-Intermediate System Denial of Service Vulnerability",
      "summary": "A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) multi-instance routing feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the IS-IS process to restart unexpectedly.\r\n\r\nThis vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending crafted IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process to restart unexpectedly, resulting in a temporary loss of connectivity to advertised networks and a denial of service (DoS) condition.\r\nNote: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency.  ",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco IOS XR Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "7.8.1",
              "status": "affected"
            },
            {
              "version": "7.9.1",
              "status": "affected"
            },
            {
              "version": "7.10.1",
              "status": "affected"
            },
            {
              "version": "7.8.2",
              "status": "affected"
            },
            {
              "version": "7.8.22",
              "status": "affected"
            },
            {
              "version": "7.9.2",
              "status": "affected"
            },
            {
              "version": "7.11.1",
              "status": "affected"
            },
            {
              "version": "7.9.21",
              "status": "affected"
            },
            {
              "version": "7.10.2",
              "status": "affected"
            },
            {
              "version": "24.1.1",
              "status": "affected"
            },
            {
              "version": "7.11.2",
              "status": "affected"
            },
            {
              "version": "24.2.1",
              "status": "affected"
            },
            {
              "version": "24.1.2",
              "status": "affected"
            },
            {
              "version": "24.2.11",
              "status": "affected"
            },
            {
              "version": "24.3.1",
              "status": "affected"
            },
            {
              "version": "24.4.1",
              "status": "affected"
            },
            {
              "version": "24.2.2",
              "status": "affected"
            },
            {
              "version": "7.8.23",
              "status": "affected"
            },
            {
              "version": "7.11.21",
              "status": "affected"
            },
            {
              "version": "24.2.20",
              "status": "affected"
            },
            {
              "version": "24.3.2",
              "status": "affected"
            },
            {
              "version": "24.4.10",
              "status": "affected"
            },
            {
              "version": "25.1.1",
              "status": "affected"
            },
            {
              "version": "24.4.2",
              "status": "affected"
            },
            {
              "version": "24.3.20",
              "status": "affected"
            },
            {
              "version": "24.4.15",
              "status": "affected"
            },
            {
              "version": "25.2.1",
              "status": "affected"
            },
            {
              "version": "25.1.2",
              "status": "affected"
            },
            {
              "version": "24.3.30",
              "status": "affected"
            },
            {
              "version": "24.4.30",
              "status": "affected"
            },
            {
              "version": "24.2.21",
              "status": "affected"
            },
            {
              "version": "25.2.15",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}