CVE-2026-20054
Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to improper error checking when decompressing VBA data. An attacker could exploit this vulnerability 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 enter an infinite loop, causing a DoS condition.
- Score
- CVSS 3.1 5.8 Medium
- Status
- Analyzed - psirt@cisco.com
- Published
- 2026-03-04
- Last modified
- 2026-03-04
- Weaknesses
- CWE-835
Affected products
- Cisco Cyber Vision (Cisco)
- Cisco Secure Firewall Threat Defense Ftd Software (Cisco)
- Cisco Utd Snort Ips Engine Software (Cisco)
- Cyber Vision (Cisco)
- Secure Firewall Threat Defense (Cisco)
- Snort (Cisco)
- Unified Threat Defense Snort Intrusion Prevention System Engine (Cisco)
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed
