What is CVE-2026-20031?

CVE-2026-20031 is a medium-severity vulnerability in Cisco Secure Endpoint, classified under CWE-248. CVSS score: 5.3/10. Published 2026-03-04.

How severe is CVE-2026-20031?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Cisco Secure Endpoint

CVE-2026-20031

A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error ha…

EPSS: 0.000 (13.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Cisco Secure Endpoint — versions 7.0.5, 6.2.19, 7.3.3

Weakness classification (CWE)

CWE-248

References

cisco-sa-clamav-css-Fn4QSZ

Frequently asked questions

What is CVE-2026-20031?: CVE-2026-20031 is a medium-severity vulnerability in Cisco Secure Endpoint, classified under CWE-248. CVSS score: 5.3/10. Published 2026-03-04.
How severe is CVE-2026-20031?: Medium severity. CVSS v3 base score is 5.3 out of 10.