What’s Vulnerable › Vulnerabilities
CVE-2026-20216: ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerability
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-01 · updated 2026-10-25
- Weakness: CWE-770
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 products
- Cisco Secure Endpoint: before 1.27.2; before 1.29.0; before 8.6.2 — fixed in 1.27.2, 1.29.0, 8.6.2
- Cisco ClamAV: before 1.4.5; from 1.5.0 before 1.5.3 — fixed in 1.4.5, 1.5.3
How to fix
Upgrade to a fixed version: Cisco Secure Endpoint 1.27.2, 1.29.0, 8.6.2; Cisco ClamAV 1.4.5, 1.5.3. Check the vendor advisory for mitigations.
References
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