{
  "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-2022-20688",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-20688",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2022-12-07T16:54:29.260Z",
    "updatedAt": "2024-08-03T02:17:53.195Z",
    "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": null,
      "summary": "A vulnerability in the Cisco Discovery Protocol functionality of Cisco ATA 190 Series Analog Telephone Adapter firmware could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device and cause Cisco Discovery Protocol service to restart.\r\n This vulnerability is due to missing length validation of certain Cisco Discovery Protocol packet header fields. An attacker could exploit these vulnerabilities by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to execute code on the affected device and cause Cisco Discovery Protocol to restart unexpectedly, resulting in a DoS condition.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco Analog Telephone Adaptor (ATA) Software",
          "versions": [
            {
              "version": "1.2.1",
              "status": "affected"
            },
            {
              "version": "1.2.2 SR1",
              "status": "affected"
            },
            {
              "version": "1.2.2",
              "status": "affected"
            },
            {
              "version": "1.2.2 SR2",
              "status": "affected"
            },
            {
              "version": "11.1.0 MSR4",
              "status": "affected"
            },
            {
              "version": "11.1.0",
              "status": "affected"
            },
            {
              "version": "11.1.0 MSR1",
              "status": "affected"
            },
            {
              "version": "11.1.0 MSR2",
              "status": "affected"
            },
            {
              "version": "11.1.0 MSR3",
              "status": "affected"
            },
            {
              "version": "1.1.0",
              "status": "affected"
            },
            {
              "version": "1.1.1",
              "status": "affected"
            },
            {
              "version": "1.1.2",
              "status": "affected"
            },
            {
              "version": "12.0.1 SR2",
              "status": "affected"
            },
            {
              "version": "12.0.1",
              "status": "affected"
            },
            {
              "version": "12.0.1 SR1",
              "status": "affected"
            },
            {
              "version": "12.0.1 SR3",
              "status": "affected"
            },
            {
              "version": "12.0.1 SR4",
              "status": "affected"
            },
            {
              "version": "11.2.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}