{
  "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-2026-20038",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-20038",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-07T16:11:55.078Z",
    "updatedAt": "2026-10-07T18:05:53.253Z",
    "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 Nexus 9000 Series Fabric Switches in ACI Mode Policy-Based Redirect Endpoint Group Contract Bypass Vulnerability",
      "summary": "A vulnerability in the endpoint group (EPG) contract functionality of Cisco Nexus 9000 Series Fabric Switches in ACI Mode could allow an unauthenticated, remote attacker to bypass configured EPG contracts.\r\n\r\nThis vulnerability is due to an improper control with EPG contracts. An attacker could exploit this vulnerability by sending IPv4 or IPv6 packets using UDP source and destination ports that are assigned to DHCP traffic through an affected device. A successful exploit could allow the attacker to bypass EPG contracts on the affected device.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco NX-OS System Software in ACI Mode",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "15.2(1g)",
              "status": "affected"
            },
            {
              "version": "15.2(2e)",
              "status": "affected"
            },
            {
              "version": "15.2(2f)",
              "status": "affected"
            },
            {
              "version": "15.2(2g)",
              "status": "affected"
            },
            {
              "version": "15.2(2h)",
              "status": "affected"
            },
            {
              "version": "15.2(3f)",
              "status": "affected"
            },
            {
              "version": "15.2(3e)",
              "status": "affected"
            },
            {
              "version": "15.2(3g)",
              "status": "affected"
            },
            {
              "version": "15.2(4d)",
              "status": "affected"
            },
            {
              "version": "15.2(4e)",
              "status": "affected"
            },
            {
              "version": "15.2(5c)",
              "status": "affected"
            },
            {
              "version": "15.2(5d)",
              "status": "affected"
            },
            {
              "version": "16.0(1g)",
              "status": "affected"
            },
            {
              "version": "15.2(5e)",
              "status": "affected"
            },
            {
              "version": "15.2(4f)",
              "status": "affected"
            },
            {
              "version": "15.2(6e)",
              "status": "affected"
            },
            {
              "version": "15.2(6h)",
              "status": "affected"
            },
            {
              "version": "16.0(1j)",
              "status": "affected"
            },
            {
              "version": "15.2(6g)",
              "status": "affected"
            },
            {
              "version": "15.2(7f)",
              "status": "affected"
            },
            {
              "version": "15.2(7g)",
              "status": "affected"
            },
            {
              "version": "16.0(2h)",
              "status": "affected"
            },
            {
              "version": "15.2(8d)",
              "status": "affected"
            },
            {
              "version": "16.0(2j)",
              "status": "affected"
            },
            {
              "version": "15.2(8e)",
              "status": "affected"
            },
            {
              "version": "16.0(3d)",
              "status": "affected"
            },
            {
              "version": "16.0(3e)",
              "status": "affected"
            },
            {
              "version": "15.2(8f)",
              "status": "affected"
            },
            {
              "version": "15.2(8g)",
              "status": "affected"
            },
            {
              "version": "15.3(1d)",
              "status": "affected"
            },
            {
              "version": "15.2(8h)",
              "status": "affected"
            },
            {
              "version": "16.0(4c)",
              "status": "affected"
            },
            {
              "version": "15.3(2a)",
              "status": "affected"
            },
            {
              "version": "15.2(8i)",
              "status": "affected"
            },
            {
              "version": "16.0(5h)",
              "status": "affected"
            },
            {
              "version": "15.3(2b)",
              "status": "affected"
            },
            {
              "version": "16.0(3g)",
              "status": "affected"
            },
            {
              "version": "16.0(5j)",
              "status": "affected"
            },
            {
              "version": "15.3(2c)",
              "status": "affected"
            },
            {
              "version": "16.0(6c)",
              "status": "affected"
            },
            {
              "version": "15.3(2d)",
              "status": "affected"
            },
            {
              "version": "16.1(1f)",
              "status": "affected"
            },
            {
              "version": "16.0(7e)",
              "status": "affected"
            },
            {
              "version": "16.0(8e)",
              "status": "affected"
            },
            {
              "version": "15.3(2e)",
              "status": "affected"
            },
            {
              "version": "16.0(8f)",
              "status": "affected"
            },
            {
              "version": "16.1(2f)",
              "status": "affected"
            },
            {
              "version": "16.1(2g)",
              "status": "affected"
            },
            {
              "version": "15.3(2f)",
              "status": "affected"
            },
            {
              "version": "16.0(9c)",
              "status": "affected"
            },
            {
              "version": "16.1(3f)",
              "status": "affected"
            },
            {
              "version": "16.0(9d)",
              "status": "affected"
            },
            {
              "version": "16.0(6h)",
              "status": "affected"
            },
            {
              "version": "16.0(8h)",
              "status": "affected"
            },
            {
              "version": "16.1(3g)",
              "status": "affected"
            },
            {
              "version": "16.0(9e)",
              "status": "affected"
            },
            {
              "version": "16.1(4h)",
              "status": "affected"
            },
            {
              "version": "16.1(5e)",
              "status": "affected"
            },
            {
              "version": "16.2(1g)",
              "status": "affected"
            },
            {
              "version": "16.0(9f)",
              "status": "affected"
            },
            {
              "version": "16.2(2e)",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}