CVE-2026-20345: Cisco Secure Endpoint

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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 vulnerability is due to improper handling of an endian conversion operation, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted GPT file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

Affected products

• Cisco Cisco Secure Endpoint: version 1.12.3 only; version 1.8.0 only; version 1.11.1 only; version 1.12.4 only; version 1.10.0 only; version 1.12.0 only; …

Published 2026-08-07. Last modified 2026-08-11.