CVE-2025-3500
Title: Integer Overflow or Wraparound in Avast Antivirus on Windows
Auth Bypass
Proof Of Concept
PoC Available for CVE-2025-3500
CWE Category
CWE-190
Published Date
Dec 01, 2025
Modified Date
Feb 06, 2026
Exploit Status
Available
Score
9.0
CVSS v3.1
Exploit Probability (EPSS)
0.23%
Vulnerability Summary
CVE-2025-3500: 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.
Impacted Vendors
Reference Links
CVSS v3.1
Source Entity
[email protected]
Severity
CRITICAL
9.0
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v3.1
Source Entity
[email protected]
Severity
CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Associated Attack Patterns (CAPEC)
Total: PatternsNo specific attack patterns mapped.
Likelihood
Severity
Page /
CVE-2025-3500 Exploits & PoCs (Proof Of Concept)
GitHub
https://github.com/chicken3962/CVE-2025-3500-Poc
MODIFIED
Vulnerability data updated via NVD.
MODIFIED
Vulnerability data updated via NVD.
MODIFIED
Vulnerability data or affected products updated.
PUBLISHED
Vulnerability first announced in NVD.
Attack Vector Matrix
Access Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
CVSS Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Affected Stack
No specific products linked.