{
  "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-2026-20019",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-20019",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-21T16:12:20.285Z",
    "updatedAt": "2026-10-22T19:10:53.022Z",
    "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": "Multiple Cisco Products Snort 3 Netflow Denial of Service Vulnerabilities",
      "summary": "Multiple Cisco products are affected by a vulnerability in the Snort 3 NetFlow Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\r\n\r\nThis vulnerability is due to incomplete error checking when Snort 3 parses UDP Netflow Protocol packets. An attacker could exploit this vulnerability by sending a single crafted Netflow packet through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco Open Source Snort3",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "3.12.2.0",
              "status": "affected"
            },
            {
              "version": "3.1.2.0",
              "status": "affected"
            },
            {
              "version": "3.1.3.0",
              "status": "affected"
            },
            {
              "version": "3.1.4.0",
              "status": "affected"
            },
            {
              "version": "3.1.5.0",
              "status": "affected"
            },
            {
              "version": "3.1.6.0",
              "status": "affected"
            },
            {
              "version": "3.1.7.0",
              "status": "affected"
            },
            {
              "version": "3.1.8.0",
              "status": "affected"
            },
            {
              "version": "3.1.9.0",
              "status": "affected"
            },
            {
              "version": "3.1.10.0",
              "status": "affected"
            },
            {
              "version": "3.1.12.0",
              "status": "affected"
            },
            {
              "version": "3.1.13.0",
              "status": "affected"
            },
            {
              "version": "3.1.14.0",
              "status": "affected"
            },
            {
              "version": "3.1.15.0",
              "status": "affected"
            },
            {
              "version": "3.1.16.0",
              "status": "affected"
            },
            {
              "version": "3.1.17.0",
              "status": "affected"
            },
            {
              "version": "3.1.18.0",
              "status": "affected"
            },
            {
              "version": "3.1.19.0",
              "status": "affected"
            },
            {
              "version": "3.1.20.0",
              "status": "affected"
            },
            {
              "version": "3.1.21.0",
              "status": "affected"
            },
            {
              "version": "3.1.22.0",
              "status": "affected"
            },
            {
              "version": "3.1.23.0",
              "status": "affected"
            },
            {
              "version": "3.1.24.0",
              "status": "affected"
            },
            {
              "version": "3.1.25.0",
              "status": "affected"
            },
            {
              "version": "3.1.27.0",
              "status": "affected"
            },
            {
              "version": "3.1.28.0",
              "status": "affected"
            },
            {
              "version": "3.1.29.0",
              "status": "affected"
            },
            {
              "version": "3.1.30.0",
              "status": "affected"
            },
            {
              "version": "3.1.31.0",
              "status": "affected"
            },
            {
              "version": "3.1.32.0",
              "status": "affected"
            },
            {
              "version": "3.1.36.0",
              "status": "affected"
            },
            {
              "version": "3.1.38.0",
              "status": "affected"
            },
            {
              "version": "3.1.39.0",
              "status": "affected"
            },
            {
              "version": "3.1.40.0",
              "status": "affected"
            },
            {
              "version": "3.1.41.0",
              "status": "affected"
            },
            {
              "version": "3.1.42.0",
              "status": "affected"
            },
            {
              "version": "3.1.43.0",
              "status": "affected"
            },
            {
              "version": "3.1.45.0",
              "status": "affected"
            },
            {
              "version": "3.1.47.0",
              "status": "affected"
            },
            {
              "version": "3.1.48.0",
              "status": "affected"
            },
            {
              "version": "3.1.50.0",
              "status": "affected"
            },
            {
              "version": "3.1.51.0",
              "status": "affected"
            },
            {
              "version": "3.1.52.0",
              "status": "affected"
            },
            {
              "version": "3.1.53.0",
              "status": "affected"
            },
            {
              "version": "3.1.55.0",
              "status": "affected"
            },
            {
              "version": "3.1.56.0",
              "status": "affected"
            },
            {
              "version": "3.1.57.0",
              "status": "affected"
            },
            {
              "version": "3.1.58.0",
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            {
              "version": "3.1.59.0",
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              "version": "3.1.60.0",
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              "version": "3.1.61.0",
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            {
              "version": "3.1.62.0",
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              "version": "3.1.63.0",
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              "version": "3.1.64.0",
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              "version": "3.1.65.0",
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              "version": "3.1.66.0",
              "status": "affected"
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            {
              "version": "3.1.67.0",
              "status": "affected"
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            {
              "version": "3.1.69.0",
              "status": "affected"
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              "version": "3.1.70.0",
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              "version": "3.1.71.0",
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              "version": "3.1.72.0",
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              "version": "3.1.73.0",
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              "version": "3.1.74.0",
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              "version": "3.1.75.0",
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              "version": "3.1.81.0",
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              "version": "3.1.82.0",
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            {
              "version": "3.2.2.0",
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            {
              "version": "3.3.0.0",
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            {
              "version": "3.3.1.0",
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            {
              "version": "3.3.2.0",
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            {
              "version": "3.3.3.0",
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            {
              "version": "3.3.4.0",
              "status": "affected"
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            {
              "version": "3.3.5.0",
              "status": "affected"
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            {
              "version": "3.3.7.0",
              "status": "affected"
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            {
              "version": "3.5.0.0",
              "status": "affected"
            },
            {
              "version": "3.5.1.0",
              "status": "affected"
            },
            {
              "version": "3.8.1.0",
              "status": "affected"
            },
            {
              "version": "3.6.0.0",
              "status": "affected"
            },
            {
              "version": "3.6.2.0",
              "status": "affected"
            },
            {
              "version": "3.9.3.0",
              "status": "affected"
            },
            {
              "version": "3.7.2.0",
              "status": "affected"
            },
            {
              "version": "3.7.0.0",
              "status": "affected"
            },
            {
              "version": "3.9.6.0",
              "status": "affected"
            },
            {
              "version": "3.10.0.0",
              "status": "affected"
            },
            {
              "version": "3.10.2.0",
              "status": "affected"
            },
            {
              "version": "3.7.4.0",
              "status": "affected"
            },
            {
              "version": "3.9.0.0",
              "status": "affected"
            },
            {
              "version": "3.5.2.0",
              "status": "affected"
            },
            {
              "version": "3.12.1.0",
              "status": "affected"
            },
            {
              "version": "3.6.1.0",
              "status": "affected"
            },
            {
              "version": "3.9.2.0",
              "status": "affected"
            },
            {
              "version": "3.6.3.0",
              "status": "affected"
            },
            {
              "version": "3.9.5.0",
              "status": "affected"
            },
            {
              "version": "3.7.1.0",
              "status": "affected"
            },
            {
              "version": "3.9.7.0",
              "status": "affected"
            },
            {
              "version": "3.7.3.0",
              "status": "affected"
            },
            {
              "version": "3.10.1.0",
              "status": "affected"
            },
            {
              "version": "3.9.1.0",
              "status": "affected"
            },
            {
              "version": "3.11.1.0",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Cisco",
          "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "7.0.0",
              "status": "affected"
            },
            {
              "version": "7.0.0.1",
              "status": "affected"
            },
            {
              "version": "7.0.1",
              "status": "affected"
            },
            {
              "version": "7.0.1.1",
              "status": "affected"
            },
            {
              "version": "7.0.2",
              "status": "affected"
            },
            {
              "version": "7.2.0",
              "status": "affected"
            },
            {
              "version": "7.0.2.1",
              "status": "affected"
            },
            {
              "version": "7.0.3",
              "status": "affected"
            },
            {
              "version": "7.2.0.1",
              "status": "affected"
            },
            {
              "version": "7.0.4",
              "status": "affected"
            },
            {
              "version": "7.2.1",
              "status": "affected"
            },
            {
              "version": "7.0.5",
              "status": "affected"
            },
            {
              "version": "7.3.0",
              "status": "affected"
            },
            {
              "version": "7.2.2",
              "status": "affected"
            },
            {
              "version": "7.2.3",
              "status": "affected"
            },
            {
              "version": "7.3.1",
              "status": "affected"
            },
            {
              "version": "7.2.4",
              "status": "affected"
            },
            {
              "version": "7.0.6",
              "status": "affected"
            },
            {
              "version": "7.2.5",
              "status": "affected"
            },
            {
              "version": "7.2.4.1",
              "status": "affected"
            },
            {
              "version": "7.3.1.1",
              "status": "affected"
            },
            {
              "version": "7.4.0",
              "status": "affected"
            },
            {
              "version": "7.0.6.1",
              "status": "affected"
            },
            {
              "version": "7.2.5.1",
              "status": "affected"
            },
            {
              "version": "7.4.1",
              "status": "affected"
            },
            {
              "version": "7.2.6",
              "status": "affected"
            },
            {
              "version": "7.0.6.2",
              "status": "affected"
            },
            {
              "version": "7.4.1.1",
              "status": "affected"
            },
            {
              "version": "7.2.7",
              "status": "affected"
            },
            {
              "version": "7.2.5.2",
              "status": "affected"
            },
            {
              "version": "7.3.1.2",
              "status": "affected"
            },
            {
              "version": "7.2.8",
              "status": "affected"
            },
            {
              "version": "7.6.0",
              "status": "affected"
            },
            {
              "version": "7.4.2",
              "status": "affected"
            },
            {
              "version": "7.2.8.1",
              "status": "affected"
            },
            {
              "version": "7.0.6.3",
              "status": "affected"
            },
            {
              "version": "7.4.2.1",
              "status": "affected"
            },
            {
              "version": "7.2.9",
              "status": "affected"
            },
            {
              "version": "7.0.7",
              "status": "affected"
            },
            {
              "version": "7.7.0",
              "status": "affected"
            },
            {
              "version": "7.4.2.2",
              "status": "affected"
            },
            {
              "version": "7.2.10",
              "status": "affected"
            },
            {
              "version": "7.6.1",
              "status": "affected"
            },
            {
              "version": "7.4.2.3",
              "status": "affected"
            },
            {
              "version": "7.0.8",
              "status": "affected"
            },
            {
              "version": "7.6.2",
              "status": "affected"
            },
            {
              "version": "7.7.10",
              "status": "affected"
            },
            {
              "version": "7.7.11",
              "status": "affected"
            },
            {
              "version": "7.0.8.1",
              "status": "affected"
            },
            {
              "version": "7.6.2.1",
              "status": "affected"
            },
            {
              "version": "7.7.10.1",
              "status": "affected"
            },
            {
              "version": "7.4.2.4",
              "status": "affected"
            },
            {
              "version": "7.2.10.2",
              "status": "affected"
            },
            {
              "version": "7.4.3",
              "status": "affected"
            },
            {
              "version": "7.6.4",
              "status": "affected"
            },
            {
              "version": "10.0.0",
              "status": "affected"
            },
            {
              "version": "7.4.4",
              "status": "affected"
            },
            {
              "version": "7.0.9",
              "status": "affected"
            },
            {
              "version": "7.2.11",
              "status": "affected"
            },
            {
              "version": "7.4.7",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Cisco",
          "product": "Cisco UTD SNORT IPS Engine Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "17.12.1a",
              "status": "affected"
            },
            {
              "version": "17.12.2",
              "status": "affected"
            },
            {
              "version": "17.13.1a",
              "status": "affected"
            },
            {
              "version": "17.12.3",
              "status": "affected"
            },
            {
              "version": "17.14.1a",
              "status": "affected"
            },
            {
              "version": "17.12.4",
              "status": "affected"
            },
            {
              "version": "17.12.3a",
              "status": "affected"
            },
            {
              "version": "17.15.1a",
              "status": "affected"
            },
            {
              "version": "17.16.1a",
              "status": "affected"
            },
            {
              "version": "17.12.4a",
              "status": "affected"
            },
            {
              "version": "17.15.2c",
              "status": "affected"
            },
            {
              "version": "17.12.4b",
              "status": "affected"
            },
            {
              "version": "17.15.2a",
              "status": "affected"
            },
            {
              "version": "17.12.5",
              "status": "affected"
            },
            {
              "version": "17.17.1",
              "status": "affected"
            },
            {
              "version": "17.12.5a",
              "status": "affected"
            },
            {
              "version": "17.15.3a",
              "status": "affected"
            },
            {
              "version": "17.15.3",
              "status": "affected"
            },
            {
              "version": "17.12.5b",
              "status": "affected"
            },
            {
              "version": "17.12.5c",
              "status": "affected"
            },
            {
              "version": "17.15.4",
              "status": "affected"
            },
            {
              "version": "17.18.1",
              "status": "affected"
            },
            {
              "version": "17.18.1a",
              "status": "affected"
            },
            {
              "version": "17.12.6",
              "status": "affected"
            },
            {
              "version": "17.15.4c",
              "status": "affected"
            },
            {
              "version": "17.12.5d",
              "status": "affected"
            },
            {
              "version": "17.18.2",
              "status": "affected"
            },
            {
              "version": "26.1.1",
              "status": "affected"
            },
            {
              "version": "17.15.5",
              "status": "affected"
            },
            {
              "version": "17.15.5a",
              "status": "affected"
            },
            {
              "version": "17.12.7",
              "status": "affected"
            },
            {
              "version": "17.12.7a",
              "status": "affected"
            },
            {
              "version": "17.12.7b",
              "status": "affected"
            },
            {
              "version": "17.18.3a",
              "status": "affected"
            },
            {
              "version": "17.12.8",
              "status": "affected"
            },
            {
              "version": "17.15.6",
              "status": "affected"
            },
            {
              "version": "17.18.4",
              "status": "affected"
            },
            {
              "version": "26.1.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}