CVE-2026-20216
ClamAV InstallShield File Format Processing Resource Exhaustion Vulnerability
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.
Weakness: CWE-770
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Endpoint | Endpoint / EDR | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Endpoint
Vendor advisory
ClamAV Vulnerabilities Affecting Cisco Products: July 2026
Cisco’s rating: High (advisory CVSS 7.5) · Published Jul 1, 2026 · updated Jul 2, 2026 (revision 1.1)
Bug IDs: CSCwt44538 , CSCwt57454 , CSCwt62774 , CSCwt62779 , CSCwt62781 , CSCwu18798 , CSCwu22472
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from