Integer Overflow Vulnerability in Avast Antivirus on Windows
CVE-2025-3500

9CRITICAL

Key Information:

Vendor

Avast

Status
Antivirus
Vendor
CVE Published:
1 December 2025

What is CVE-2025-3500?

An integer overflow vulnerability has been identified in Avast Antivirus for Windows, specifically affecting versions 25.1.981.6 through 25.3. This flaw could allow an attacker to exploit the system and gain elevated privileges, potentially leading to unauthorized access to sensitive information or system functions. Users are advised to update their software to the latest version to mitigate this risk and maintain optimal security.

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Deploy the Patch

Affected Version(s)

Antivirus Windows 25.1.981.6

References

https://www.gendigital.com/us/en/contact-us/security-advi...

CVSS V3.1

Score:
9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Baris Akkaya
Trend Micro Zero Day Initiative
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