Description
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.
Affected products
cisco: snort; cisco: cyber vision; cisco: secure firewall threat defense; cisco: unified threat defense snort intrusion prevention system engine
References1
- sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAd… Vendor AdvisoryMitigation
Metrics
- CVSS 3.1
-
5.8
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 42 · as of 12 November 2026
- CWE
- CWE-835
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