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Critical 9.0Published Dec 1, 2025
CVE-2025-3500Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation
Updated under an hour ago ()
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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.
- CVSS
- 9.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NLOK
- NVD analysis
- Analyzed
- Record last updated
- Feb 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Avast Antivirus avast:antivirus (from the name) | from 25.1.981.6 before 25.3 | CNA record |
avast antivirus avast:antivirus | from 25.1.981.6 before 25.3 | NVD |
References
- https://www.gendigital.com/us/en/contact-us/security-advisories/not-applicable
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.