CVE-2025-3500
Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation
- Published
- Dec 1, 2025
- Updated
- Feb 26, 2026
- Assigning CNA
- NLOK
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 38.9%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1Educational lab environment for researching CVE-2025-3500, an integer overflow privilege escalation exploit in Avast Antivirus 25.1.981.6 on Windows, with synthetic exploit artifacts for controlled testing.
Responsible use
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