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CVE-2026-20006 Cisco Firepower Threat Defense Software and Cisco FirePOWER Services TLS with Snort 3 Denial of Service Vulnerability

🗓️ 04 Mar 2026 17:37:54Reported by ciscoType 
cvelist
 cvelist
🔗 www.cve.org👁 26 Views

Unauthenticated attacker can exploit transport layer security in Snort 3 to restart the engine and cause DoS on Cisco Secure Firewall.

Related
Affected
Refs
[
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
    "versions": [
      {
        "version": "7.2.0",
        "status": "affected"
      },
      {
        "version": "7.2.0.1",
        "status": "affected"
      },
      {
        "version": "7.2.1",
        "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": "7.2.5",
        "status": "affected"
      },
      {
        "version": "7.2.4.1",
        "status": "affected"
      },
      {
        "version": "7.3.1.1",
        "status": "affected"
      },
      {
        "version": "7.4.0",
        "status": "affected"
      },
      {
        "version": "7.2.5.1",
        "status": "affected"
      },
      {
        "version": "7.4.1",
        "status": "affected"
      },
      {
        "version": "7.2.6",
        "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": "7.4.2.1",
        "status": "affected"
      },
      {
        "version": "7.2.9",
        "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": "7.6.2",
        "status": "affected"
      },
      {
        "version": "7.6.2.1",
        "status": "affected"
      },
      {
        "version": "7.4.2.4",
        "status": "affected"
      },
      {
        "version": "7.2.10.2",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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