{
  "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-2022-20849",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-20849",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2024-11-15T15:31:20.913Z",
    "updatedAt": "2024-11-15T15:46:25.684Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "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 Broadband Network Gateway PPPoE Denial of Service Vulnerability",
      "summary": "A vulnerability in the Broadband Network Gateway PPP over Ethernet (PPPoE) feature of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the PPPoE process to continually crash.\r\nThis vulnerability exists because the PPPoE feature does not properly handle an error condition within a specific crafted packet sequence. An attacker could exploit this vulnerability by sending a sequence of specific PPPoE packets from controlled customer premises equipment (CPE). A successful exploit could allow the attacker to cause the PPPoE process to continually restart, resulting in a denial of service condition (DoS).Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2022 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see .",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco IOS XR Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "6.5.3",
              "status": "affected"
            },
            {
              "version": "6.6.1",
              "status": "affected"
            },
            {
              "version": "6.5.15",
              "status": "affected"
            },
            {
              "version": "7.0.1",
              "status": "affected"
            },
            {
              "version": "6.6.25",
              "status": "affected"
            },
            {
              "version": "6.6.2",
              "status": "affected"
            },
            {
              "version": "6.5.1",
              "status": "affected"
            },
            {
              "version": "6.5.2",
              "status": "affected"
            },
            {
              "version": "7.1.1",
              "status": "affected"
            },
            {
              "version": "7.0.90",
              "status": "affected"
            },
            {
              "version": "6.6.3",
              "status": "affected"
            },
            {
              "version": "6.7.1",
              "status": "affected"
            },
            {
              "version": "7.0.2",
              "status": "affected"
            },
            {
              "version": "7.1.15",
              "status": "affected"
            },
            {
              "version": "7.1.2",
              "status": "affected"
            },
            {
              "version": "7.2.1",
              "status": "affected"
            },
            {
              "version": "6.7.2",
              "status": "affected"
            },
            {
              "version": "7.1.25",
              "status": "affected"
            },
            {
              "version": "6.6.4",
              "status": "affected"
            },
            {
              "version": "7.3.1",
              "status": "affected"
            },
            {
              "version": "7.1.3",
              "status": "affected"
            },
            {
              "version": "6.7.3",
              "status": "affected"
            },
            {
              "version": "7.4.1",
              "status": "affected"
            },
            {
              "version": "7.2.2",
              "status": "affected"
            },
            {
              "version": "6.8.1",
              "status": "affected"
            },
            {
              "version": "7.3.2",
              "status": "affected"
            },
            {
              "version": "7.5.1",
              "status": "affected"
            },
            {
              "version": "7.3.3",
              "status": "affected"
            },
            {
              "version": "6.8.2",
              "status": "affected"
            },
            {
              "version": "7.3.4",
              "status": "affected"
            },
            {
              "version": "7.4.2",
              "status": "affected"
            },
            {
              "version": "6.7.35",
              "status": "affected"
            },
            {
              "version": "6.9.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}