What is CVE-2026-20345?

CVE-2026-20345 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-08-07.

How severe is CVE-2026-20345?

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

Buffer overflow in Cisco Secure Endpoint

CVE-2026-20345

A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulner…

Vulnerability class: Buffer Overflow

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 1.12.3, 1.8.0, 1.11.1

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

psirt@cisco.com

Frequently asked questions

What is CVE-2026-20345?: CVE-2026-20345 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-08-07.
How severe is CVE-2026-20345?: High severity. CVSS v3 base score is 7.5 out of 10.