CVE-2025-3500
Critical
Description
Integer Overflow or Wraparound vulnerability in Avast Antivirus (25.1.981.6) on Windows allows Privilege Escalation.This issue affects Antivirus: from 25.1.981.6 before 25.3.
SeverityCritical
CVSS9.0
Exploit probability—
ProductAvast Antivirus
PublishedDec 1, 2025
First seenDec 1, 2025
Weakness typeCWE-190Integer overflow
How to fix
Update
- avast antivirus25.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| avast antivirus | 25.1.981.6 ≤ v < 25.3 | 25.3 |
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