Avast Antivirus Privilege Escalation Vulnerability via Integer Overflow on Windows

Vulnerability

A vulnerability allowing privilege escalation through integer overflow or wraparound has been identified in Avast Antivirus version 25.1.981.6 on Windows. This issue affects versions from 25.1.981.6 prior to 25.3.

Impact

Exploitation of this vulnerability could lead to unauthorized privilege escalation, allowing a user to gain elevated rights or access within the system.

Added: Dec 1, 2025, 4:32 PM
Updated: Dec 1, 2025, 4:32 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
5.0
exploitability
3.3
remediation
0.0
relevance
1.2
threat
0.0
urgency
2.9
incentive
0.8

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.