CVE-2006-1355: Alwil Avast Antivirus

High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days.

avast! Antivirus 4.6.763 and earlier sets "BUILTIN\Everyone" permissions to critical system files in the installation folder, which allows local users to gain privileges or disable protection by modifying those files.

Affected products

• Alwil Avast Antivirus: up to and including 4.6.763

Published 2006-03-22. Last modified 2026-06-16.