CVE-2026-20065
Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability
At a glance Severity MEDIUM 5.8 EPSS EPSS 0.39 % · percentile 33 (2026-10-27) State PUBLISHED Published 2026-03-04 Updated 2026-03-04 Assigner cisco NVD status Analyzed Description 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.
Scores Version Score Vector Scored by CVSS 3.1 MEDIUM 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L cisco CVSS 3.1 MEDIUM 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L NVD · psirt@cisco.com (Secondary)
Weaknesses (CWE)
European references
Affected configurations (NVD CPE) cpe:2.3:a:cisco:snort:*:*:*:*:*:*:*:* ≥ 3.0.0-233 < 3.6.3.0cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.1.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.2:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.2.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.3:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.4:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.5:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6.2:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.6.3:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.7:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.8:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.8.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0.2:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.1.0.3:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.2:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.3:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.2:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.6:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.7:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.9:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.10:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.10.2:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1:*:*:*:*:*:*:*+82 more Affected products
References
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