CVE-2005-1770: Alwil Avast Antivirus

High severity, CVSS 7.2. EPSS: 0.7% chance of exploitation in the next 30 days.

Buffer overflow in the Aavmker4 device driver in Avast! Antivirus 4.6 and possibly other versions allows local users to cause a denial of service (system crash) and possibly execute arbitrary code via certain signals combined with crafted input.

Affected products

• Alwil Avast Antivirus: version 4.0.168 only; version 4.0.172 only; version 4.0.183 only; version 4.0.202 only; version 4.0.211 only; version 4.0.229 only; …

Published 2005-05-31. Last modified 2026-06-16.