CVE-2005-2385: Alwil Avast Antivirus

High severity, CVSS 7.5. EPSS: 4% chance of exploitation in the next 30 days.

Buffer overflow in a third-party compression library (UNACEV2.DLL), as used in avast! Antivirus Home/Professional Edition 4.6.665 and Server Edition 4.6.460, allows remote attackers to execute arbitrary code via an ACE archive containing a long filename.

Affected products

• Alwil Avast Antivirus: version 4.6.460 only; version 4.6.665 only

Published 2005-07-27. Last modified 2026-06-16.