CVE-2026-20058

Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition.

• cisco snort (>= 3.0.0-233 < 3.9.6.0) • cisco secure firewall threat defense 7.2.0 • cisco secure firewall threat defense 7.2.0.1 • cisco secure firewall threat defense 7.2.1 • cisco secure firewall threat defense 7.2.2 • cisco secure firewall threat defense 7.2.3 • cisco secure firewall threat defense 7.2.4 • cisco secure firewall threat defense 7.2.4.1 • cisco secure firewall threat defense 7.2.5 • cisco secure firewall threat defense 7.2.5.1 • cisco secure firewall threat defense 7.2.5.2 • cisco secure firewall threat defense 7.2.6 • cisco secure firewall threat defense 7.2.7 • cisco secure firewall threat defense 7.2.8 • cisco secure firewall threat defense 7.2.8.1 • cisco secure firewall threat defense 7.2.9 • cisco secure firewall threat defense 7.2.10 • cisco secure firewall threat defense 7.2.10.2 • cisco secure firewall threat defense 7.3.0 • cisco secure firewall threat defense 7.3.1 • cisco secure firewall threat defense 7.3.1.1 • cisco secure firewall threat defense 7.3.1.2 • cisco secure firewall threat defense 7.4.0 • cisco secure firewall threat defense 7.4.1 • cisco secure firewall threat defense 7.4.1.1 • cisco secure firewall threat defense 7.4.2 • cisco secure firewall threat defense 7.4.2.1 • cisco secure firewall threat defense 7.4.2.2 • cisco secure firewall threat defense 7.4.2.3 • cisco secure firewall threat defense 7.4.2.4 • cisco secure firewall threat defense 7.4.3 • cisco secure firewall threat defense 7.6.0 • cisco secure firewall threat defense 7.6.1 • cisco secure firewall threat defense 7.6.2 • cisco secure firewall threat defense 7.6.2.1 • cisco secure firewall threat defense 7.7.0 • cisco secure firewall threat defense 7.7.10 • cisco secure firewall threat defense 7.7.10.1 • cisco unified threat defense snort intrusion prevention system engine 17.9.3a • cisco unified threat defense snort intrusion prevention system engine 17.9.5a • cisco unified threat defense snort intrusion prevention system engine 17.9.6 • cisco unified threat defense snort intrusion prevention system engine 17.12.1a • cisco unified threat defense snort intrusion prevention system engine 17.12.2 • cisco unified threat defense snort intrusion prevention system engine 17.12.3 • cisco unified threat defense snort intrusion prevention system engine 17.12.3a • cisco unified threat defense snort intrusion prevention system engine 17.12.4 • cisco unified threat defense snort intrusion prevention system engine 17.12.4a • cisco unified threat defense snort intrusion prevention system engine 17.12.4b • cisco unified threat defense snort intrusion prevention system engine 17.12.5 • cisco unified threat defense snort intrusion prevention system engine 17.12.5a • cisco unified threat defense snort intrusion prevention system engine 17.12.5b • cisco unified threat defense snort intrusion prevention system engine 17.12.5c • cisco unified threat defense snort intrusion prevention system engine 17.12.5d • cisco unified threat defense snort intrusion prevention system engine 17.12.6 • cisco unified threat defense snort intrusion prevention system engine 17.13.1a • cisco unified threat defense snort intrusion prevention system engine 17.14.1a • cisco unified threat defense snort intrusion prevention system engine 17.15.1a • cisco unified threat defense snort intrusion prevention system engine 17.15.2a • cisco unified threat defense snort intrusion prevention system engine 17.15.2c • cisco unified threat defense snort intrusion prevention system engine 17.15.3 … and 8 more