CVE-2023-1586: Avast Antivirus

Medium severity, CVSS 4.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Avast and AVG Antivirus for Windows were susceptible to a Time-of-check/Time-of-use (TOCTOU) vulnerability in the restore process leading to arbitrary file creation. The issue was fixed with Avast and AVG Antivirus version 22.11

Affected products

• Avast Antivirus: from 22.5, before 22.11 (fixed in 22.11)
• Avg Anti-Virus: from 22.5, before 22.11 (fixed in 22.11)

Published 2023-04-19. Last modified 2026-06-17.