What is CVE-2026-20054?

CVE-2026-20054 is a medium-severity vulnerability in Cisco Cyber Vision, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.8/10. Published 2026-03-04.

How severe is CVE-2026-20054?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Cisco Cyber Vision

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 ch…

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 3.17.1S, 16.12.3, Fuji-16.9.5

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

cisco-sa-ftd-snort3-vbavuls-96UcVVed

Frequently asked questions

What is CVE-2026-20054?: CVE-2026-20054 is a medium-severity vulnerability in Cisco Cyber Vision, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.8/10. Published 2026-03-04.
How severe is CVE-2026-20054?: Medium severity. CVSS v3 base score is 5.8 out of 10.