Buffer overflow in Cisco Cyber Vision
CVE-2026-20053
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…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (13.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.
Affected products
- Cisco Cyber Vision — versions 3.0.0, 3.0.2, 3.0.3
- Cisco Secure Firewall Threat Defense (Ftd) Software — versions 7.2.0, 7.2.0.1, 7.2.1
- Cisco Utd Snort Ips Engine Software — versions 17.12.1a, 17.9.4, 17.12.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20053?
- CVE-2026-20053 is a medium-severity vulnerability in Cisco Cyber Vision, classified under Heap-based Buffer Overflow. CVSS score: 5.8/10. Published 2026-03-04.
- How severe is CVE-2026-20053?
- Medium severity. CVSS v3 base score is 5.8 out of 10.