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CVE-2026-20066 Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability

🗓️ 04 Mar 2026 17:49:00Reported by ciscoType 
cvelist
 cvelist
🔗 www.cve.org👁 28 Views

Unauthenticated remote DoS in Snort 3 via crafted HTTP packets exploiting JSTokenizer.

Related
Affected
Refs
[
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
    "versions": [
      {
        "version": "7.4.0",
        "status": "affected"
      },
      {
        "version": "7.4.1",
        "status": "affected"
      },
      {
        "version": "7.4.1.1",
        "status": "affected"
      },
      {
        "version": "7.6.0",
        "status": "affected"
      },
      {
        "version": "7.4.2",
        "status": "affected"
      },
      {
        "version": "7.4.2.1",
        "status": "affected"
      },
      {
        "version": "7.7.0",
        "status": "affected"
      },
      {
        "version": "7.4.2.2",
        "status": "affected"
      },
      {
        "version": "7.6.1",
        "status": "affected"
      },
      {
        "version": "7.4.2.3",
        "status": "affected"
      },
      {
        "version": "7.6.2",
        "status": "affected"
      },
      {
        "version": "7.7.10",
        "status": "affected"
      },
      {
        "version": "7.6.2.1",
        "status": "affected"
      },
      {
        "version": "7.7.10.1",
        "status": "affected"
      },
      {
        "version": "7.4.2.4",
        "status": "affected"
      },
      {
        "version": "7.4.3",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "Cisco",
    "product": "Cisco UTD SNORT IPS Engine Software",
    "versions": [
      {
        "version": "17.3.1a",
        "status": "affected"
      },
      {
        "version": "17.2.1r",
        "status": "affected"
      },
      {
        "version": "17.3.2",
        "status": "affected"
      },
      {
        "version": "17.4.1a",
        "status": "affected"
      },
      {
        "version": "17.5.1",
        "status": "affected"
      },
      {
        "version": "17.3.3",
        "status": "affected"
      },
      {
        "version": "17.5.1a",
        "status": "affected"
      },
      {
        "version": "17.3.4",
        "status": "affected"
      },
      {
        "version": "17.3.4a",
        "status": "affected"
      },
      {
        "version": "17.4.2",
        "status": "affected"
      },
      {
        "version": "17.4.1b",
        "status": "affected"
      },
      {
        "version": "17.6.1a",
        "status": "affected"
      },
      {
        "version": "17.7.1a",
        "status": "affected"
      },
      {
        "version": "17.6.2",
        "status": "affected"
      },
      {
        "version": "17.8.1a",
        "status": "affected"
      },
      {
        "version": "17.3.5",
        "status": "affected"
      },
      {
        "version": "17.6.3",
        "status": "affected"
      },
      {
        "version": "17.6.3a",
        "status": "affected"
      },
      {
        "version": "17.7.2",
        "status": "affected"
      },
      {
        "version": "17.9.1a",
        "status": "affected"
      },
      {
        "version": "17.6.4",
        "status": "affected"
      },
      {
        "version": "17.10.1a",
        "status": "affected"
      },
      {
        "version": "17.3.6",
        "status": "affected"
      },
      {
        "version": "17.3.7",
        "status": "affected"
      },
      {
        "version": "17.9.2a",
        "status": "affected"
      },
      {
        "version": "17.6.5",
        "status": "affected"
      },
      {
        "version": "17.11.1a",
        "status": "affected"
      },
      {
        "version": "17.9.3a",
        "status": "affected"
      },
      {
        "version": "17.12.1a",
        "status": "affected"
      },
      {
        "version": "17.9.4",
        "status": "affected"
      },
      {
        "version": "17.6.6",
        "status": "affected"
      },
      {
        "version": "17.3.8",
        "status": "affected"
      },
      {
        "version": "17.3.8a",
        "status": "affected"
      },
      {
        "version": "17.6.6a",
        "status": "affected"
      },
      {
        "version": "17.9.4a",
        "status": "affected"
      },
      {
        "version": "17.12.2",
        "status": "affected"
      },
      {
        "version": "17.13.1a",
        "status": "affected"
      },
      {
        "version": "17.9.5a",
        "status": "affected"
      },
      {
        "version": "17.12.3",
        "status": "affected"
      },
      {
        "version": "17.6.7",
        "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": "17.6.8",
        "status": "affected"
      },
      {
        "version": "17.9.6",
        "status": "affected"
      },
      {
        "version": "17.6.8a",
        "status": "affected"
      },
      {
        "version": "17.16.1a",
        "status": "affected"
      },
      {
        "version": "17.9.5e",
        "status": "affected"
      },
      {
        "version": "17.12.4a",
        "status": "affected"
      },
      {
        "version": "17.15.2c",
        "status": "affected"
      },
      {
        "version": "17.9.5f",
        "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": "17.9.7a",
        "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": "17.9.7b",
        "status": "affected"
      },
      {
        "version": "17.18.1",
        "status": "affected"
      },
      {
        "version": "17.18.1a",
        "status": "affected"
      },
      {
        "version": "17.12.6",
        "status": "affected"
      },
      {
        "version": "17.9.8",
        "status": "affected"
      },
      {
        "version": "17.15.4c",
        "status": "affected"
      },
      {
        "version": "17.12.5d",
        "status": "affected"
      },
      {
        "version": "17.18.2",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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04 Mar 2026 17:49Current
CVSS 3.15.8
EPSS0.00475
28