CVE-2010-3126: Avast Antivirus Free

High severity, CVSS 9.3. EPSS: 7.8% chance of exploitation in the next 30 days.

Untrusted search path vulnerability in avast! Free Antivirus version 5.0.594 and earlier allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse mfc90loc.dll that is located in the same folder as an avast license (.avastlic) file.

Affected products

• Avast Avast Antivirus Free: up to and including 5.0.594

Published 2010-08-26. Last modified 2026-06-16.