CVE-2026-20057

Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.    This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 a denial of service (DoS) condition.

• cisco snort (>= 3.0.0-233 < 3.9.3.0) • cisco cyber vision 3.0.0 • cisco cyber vision 3.0.1 • cisco cyber vision 3.0.2 • cisco cyber vision 3.0.3 • cisco cyber vision 3.0.4 • cisco cyber vision 3.0.5 • cisco cyber vision 3.0.6 • cisco cyber vision 3.1.0 • cisco cyber vision 3.1.1 • cisco cyber vision 3.1.2 • cisco cyber vision 3.2.0 • cisco cyber vision 3.2.1 • cisco cyber vision 3.2.2 • cisco cyber vision 3.2.3 • cisco cyber vision 3.2.4 • cisco cyber vision 4.0.0 • cisco cyber vision 4.0.1 • cisco cyber vision 4.0.2 • cisco cyber vision 4.0.3 • cisco cyber vision 4.1.0 • cisco cyber vision 4.1.1 • cisco cyber vision 4.1.2 • cisco cyber vision 4.1.3 • cisco cyber vision 4.1.4 • cisco cyber vision 4.1.5 • cisco cyber vision 4.1.6 • cisco cyber vision 4.1.7 • cisco cyber vision 4.2.0 • cisco cyber vision 4.2.1 • cisco cyber vision 4.2.2 • cisco cyber vision 4.2.3 • cisco cyber vision 4.2.4 • cisco cyber vision 4.2.6 • cisco cyber vision 4.3.0 • cisco cyber vision 4.3.1 • cisco cyber vision 4.3.2 • cisco cyber vision 4.3.3 • cisco cyber vision 4.4.0 • cisco cyber vision 4.4.1 • cisco cyber vision 4.4.2 • cisco cyber vision 4.4.3 • cisco cyber vision 5.0.0 • cisco cyber vision 5.0.1 • cisco cyber vision 5.0.2 • cisco cyber vision 5.1.0 • cisco cyber vision 5.1.1 • cisco cyber vision 5.1.2 • cisco cyber vision 5.1.3 • cisco cyber vision 5.2.0 • cisco cyber vision 5.2.1 • cisco cyber vision 5.3.0 • cisco cyber vision 5.3.1 • 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 … and 57 more