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 range checking when decompressing VBA data, which is user controlled. 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 an overflow of heap data, which could cause 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: 41 · as of 12 November 2026
- CWE
- CWE-122
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