What is CVE-2026-20338?

CVE-2026-20338 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Double Free. CVSS score: 7.5/10. Published 2026-08-07.

How severe is CVE-2026-20338?

High severity. CVSS v3 base score is 7.5 out of 10.

Double Free in Cisco Secure Endpoint

CVE-2026-20338

A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper memory handling when processing content in zip fil…

Vulnerability class: Double Free

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cisco Secure Endpoint — versions 7.0.5, 6.2.19, 7.3.3

Weakness classification (CWE)

CWE-415 — Double Free

References

psirt@cisco.com

Frequently asked questions

What is CVE-2026-20338?: CVE-2026-20338 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Double Free. CVSS score: 7.5/10. Published 2026-08-07.
How severe is CVE-2026-20338?: High severity. CVSS v3 base score is 7.5 out of 10.