Multiple Cisco products are affected by a vulnerability in the Snort 3 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. This vulnerability is due to an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.

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According to its self-reported version, Cisco Secure Firewall Threat Defense (FTD) Software is affected by multiple vulnerabilities.

  - Multiple Cisco products are affected by vulnerabilities in the Snort 3 detection engine that could allow     an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart,     resulting in a denial of service (DoS) condition. (CVE-2026-20005, CVE-2026-20065, CVE-2026-20066,     CVE-2026-20067, CVE-2026-20068)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

According to its self-reported version, Cisco ASA Software is affected by a vulnerability.

  - Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that...
    (CVE-2026-20065)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

ID	Name	Product	Family	Severity
311446	Multiple Cisco Products Snort 3 Multiple DoS (cisco-sa-snort3-multi-dos-XFWkWSwz)	Nessus	CISCO	medium
301694	Multiple Cisco Products Snort 3 DoS Vulnerabilities (cisco-sa-snort3-multi-dos-XFWkWSwz_CVE-2026-20065)	Nessus	CISCO	medium

Detections

Analytics

CVE-2026-20065

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Tenable Plugins

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