{
  "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-2025-20137",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-20137",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-05-07T17:31:45.590Z",
    "updatedAt": "2025-05-07T19:45:55.934Z",
    "importedAt": "2026-10-24T01:57:24.991Z",
    "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 access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 1000 Switches and Cisco Catalyst 2960L Switches could allow an unauthenticated, remote attacker to bypass a configured ACL.\r\n\r This vulnerability is due to the use of both an IPv4 ACL and a dynamic ACL of IP Source Guard on the same interface, which is an unsupported configuration. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.\r\n\r Note: Cisco documentation has been updated to reflect that this is an unsupported configuration. However, Cisco is publishing this advisory because the device will not prevent an administrator from configuring both features on the same interface. There are no plans to implement the ability to configure both features on the same interface on Cisco Catalyst 1000 or Catalyst 2960L Switches.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "IOS",
          "versions": [
            {
              "version": "15.2(5a)E",
              "status": "affected"
            },
            {
              "version": "15.2(5b)E",
              "status": "affected"
            },
            {
              "version": "15.2(5c)E",
              "status": "affected"
            },
            {
              "version": "15.2(6)E",
              "status": "affected"
            },
            {
              "version": "15.2(6)E1",
              "status": "affected"
            },
            {
              "version": "15.2(6)E0c",
              "status": "affected"
            },
            {
              "version": "15.2(6)E2",
              "status": "affected"
            },
            {
              "version": "15.2(7)E",
              "status": "affected"
            },
            {
              "version": "15.2(6)E2b",
              "status": "affected"
            },
            {
              "version": "15.2(7)E1",
              "status": "affected"
            },
            {
              "version": "15.2(7)E0a",
              "status": "affected"
            },
            {
              "version": "15.2(7)E0s",
              "status": "affected"
            },
            {
              "version": "15.2(6)E3",
              "status": "affected"
            },
            {
              "version": "15.2(7)E2",
              "status": "affected"
            },
            {
              "version": "15.2(7a)E0b",
              "status": "affected"
            },
            {
              "version": "15.2(7)E3",
              "status": "affected"
            },
            {
              "version": "15.2(7)E1a",
              "status": "affected"
            },
            {
              "version": "15.2(7b)E0b",
              "status": "affected"
            },
            {
              "version": "15.2(7)E4",
              "status": "affected"
            },
            {
              "version": "15.2(7)E3k",
              "status": "affected"
            },
            {
              "version": "15.2(8)E",
              "status": "affected"
            },
            {
              "version": "15.2(8)E1",
              "status": "affected"
            },
            {
              "version": "15.2(7)E5",
              "status": "affected"
            },
            {
              "version": "15.2(7)E6",
              "status": "affected"
            },
            {
              "version": "15.2(8)E2",
              "status": "affected"
            },
            {
              "version": "15.2(7)E7",
              "status": "affected"
            },
            {
              "version": "15.2(8)E3",
              "status": "affected"
            },
            {
              "version": "15.2(7)E8",
              "status": "affected"
            },
            {
              "version": "15.2(8)E4",
              "status": "affected"
            },
            {
              "version": "15.2(7)E9",
              "status": "affected"
            },
            {
              "version": "15.2(8)E5",
              "status": "affected"
            },
            {
              "version": "15.2(8)E6",
              "status": "affected"
            },
            {
              "version": "15.2(7)E10",
              "status": "affected"
            },
            {
              "version": "15.2(7)E11",
              "status": "affected"
            },
            {
              "version": "15.2(7)E12",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}