CVE-2026-20216 HIGH

CVE-2026-20216: ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerability

Vendor Cisco
Product Cisco Secure Endpoint
Weakness CWE-770 · Uncontrolled resource consumption
Published July 1, 2026
Last update July 1, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 1, 2026 CVE published
July 1, 2026 Record updated