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Vulnerability · Published Jul 1, 2026 · Assigned by cisco

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

High 7.5

In plain English

A high-severity resource allocation without limits in Cisco Secure Endpoint from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 52.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.24clamav1.4.5-r0ALPINE-CVE-2026-20216
Debian:12clamav1.4.6+dfsg-0+deb12u1DEBIAN-CVE-2026-20216
Debian:13clamavno fix listedDEBIAN-CVE-2026-20216
Debian:14clamav1.4.5+dfsg-1DEBIAN-CVE-2026-20216
Ubuntu:22.04:LTSclamav1.5.3+dfsg-0ubuntu0.22.04.2USN-8517-1
Ubuntu:22.04:LTSclamav1.5.3+dfsg-0ubuntu0.22.04.2UBUNTU-CVE-2026-20216
Ubuntu:24.04:LTSclamav1.5.3+dfsg-0ubuntu0.24.04.1USN-8517-1
Ubuntu:24.04:LTSclamav1.5.3+dfsg-0ubuntu0.24.04.1UBUNTU-CVE-2026-20216
Ubuntu:25.10clamavno fix listedUBUNTU-CVE-2026-20216
Ubuntu:26.04:LTSclamav1.5.3+dfsg-0ubuntu0.26.04.1UBUNTU-CVE-2026-20216
Ubuntu:26.04:LTSclamav1.5.3+dfsg-0ubuntu0.26.04.1USN-8517-1

Affected products (as reported)

VendorProductVersions
Cisco Cisco Secure Endpoint 7.0.56.2.197.3.37.2.136.1.56.3.16.2.57.3.5

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References