{
  "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-2021-1494",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-1494",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-11-15T16:21:36.666Z",
    "updatedAt": "2024-11-15T21:23:12.943Z",
    "importedAt": "2026-10-24T01:56:21.187Z",
    "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": "Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP.\r\n The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco Firepower Threat Defense Software",
          "versions": [
            {
              "version": "N/A",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Cisco",
          "product": "Cisco UTD SNORT IPS Engine Software",
          "versions": [
            {
              "version": "16.12.1a",
              "status": "affected"
            },
            {
              "version": "16.12.2",
              "status": "affected"
            },
            {
              "version": "16.12.3",
              "status": "affected"
            },
            {
              "version": "16.12.4",
              "status": "affected"
            },
            {
              "version": "16.6.1",
              "status": "affected"
            },
            {
              "version": "16.6.5",
              "status": "affected"
            },
            {
              "version": "16.6.6",
              "status": "affected"
            },
            {
              "version": "16.6.7a",
              "status": "affected"
            },
            {
              "version": "16.6.9",
              "status": "affected"
            },
            {
              "version": "17.1.1",
              "status": "affected"
            },
            {
              "version": "17.2.1r",
              "status": "affected"
            },
            {
              "version": "17.3.1a",
              "status": "affected"
            },
            {
              "version": "17.3.2",
              "status": "affected"
            },
            {
              "version": "3.17.0S",
              "status": "affected"
            },
            {
              "version": "3.17.1S",
              "status": "affected"
            },
            {
              "version": "Fuji-16.9.2",
              "status": "affected"
            },
            {
              "version": "Fuji-16.9.4",
              "status": "affected"
            },
            {
              "version": "Fuji-16.9.6",
              "status": "affected"
            },
            {
              "version": "Fuji-16.9.3",
              "status": "affected"
            },
            {
              "version": "Fuji-16.9.7",
              "status": "affected"
            },
            {
              "version": "Fuji-16.9.5",
              "status": "affected"
            },
            {
              "version": "Denali-16.3.3",
              "status": "affected"
            },
            {
              "version": "Denali-16.3.9",
              "status": "affected"
            },
            {
              "version": "Denali-16.3.7",
              "status": "affected"
            },
            {
              "version": "Denali-16.3.5",
              "status": "affected"
            },
            {
              "version": "Denali-16.3.4",
              "status": "affected"
            },
            {
              "version": "Everest-16.6.3",
              "status": "affected"
            },
            {
              "version": "Everest-16.6.4",
              "status": "affected"
            },
            {
              "version": "Everest-16.6.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}