CVE-2005-2920: Clam Anti-Virus Clamav

High severity, CVSS 7.5. EPSS: 8.2% chance of exploitation in the next 30 days.

Buffer overflow in libclamav/upx.c in Clam AntiVirus (ClamAV) before 0.87 allows remote attackers to execute arbitrary code via a crafted UPX packed executable.

Affected products

• Clam Anti-Virus Clamav: version 0.70 only; version 0.71 only; version 0.72 only; version 0.73 only; version 0.74 only; version 0.75 only; …

Published 2005-09-20. Last modified 2026-06-16.