CVE-2026-20216

High

Description

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.

SeverityHigh
CVSS7.5
Exploit probability—
ProductClamav
PublishedJul 1, 2026
First seenJul 1, 2026

How to fix

Update
  • clamav clamav1.4.5, 1.5.3 or later
  • cisco secure_endpoint1.27.2, 1.29.0, 8.6.2 or later

Affected products

ProductAffected versionsFixed in
clamav clamavv < 1.4.5, 1.5.0 ≤ v < 1.5.31.4.5, 1.5.3
cisco secure_endpointv < 1.27.2, v < 1.29.0, v < 8.6.21.27.2, 1.29.0, 8.6.2

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