CVE-2026-20216: Cisco Secure Endpoint

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability in the InstallShield file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper handling of temporary resources during file scanning. An attacker could exploit this vulnerability by submitting a crafted InstallShield file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process and temporarily consume available system resources, resulting in a DoS condition on the affected software.

Affected products

• Cisco Secure Endpoint: before 1.27.2 (fixed in 1.27.2); before 1.29.0 (fixed in 1.29.0); before 8.6.2 (fixed in 8.6.2)
• Clamav Clamav: before 1.4.5 (fixed in 1.4.5); from 1.5.0, before 1.5.3 (fixed in 1.5.3)

Published 2026-07-01. Last modified 2026-07-09.