- Vulnerability/
- ZDI-25-256
ZDI-25-256: Avast Free Antivirus Integer Overflow Local Privilege Escalation Vulnerability
First published: Thu Apr 24 2025(Updated: )
This vulnerability allows local attackers to escalate privileges on affected installations of Avast Free Antivirus. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2025-3500.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Avast Antivirus |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-25-256?
ZDI-25-256 has been assigned a CVSS rating indicating a critical risk due to its potential for privilege escalation.
How do I fix ZDI-25-256?
To mitigate ZDI-25-256, users should update Avast Free Antivirus to the latest version where the vulnerability has been patched.
Who is affected by ZDI-25-256?
ZDI-25-256 affects users of Avast Free Antivirus specifically on systems where low-privileged code can be executed.
What kind of attack does ZDI-25-256 involve?
ZDI-25-256 enables local attackers to escalate privileges after executing low-privileged code on the vulnerable system.
What steps should I take if I suspect ZDI-25-256 has been exploited?
If you suspect that ZDI-25-256 has been exploited, you should immediately secure your system, remove any unauthorized access, and update your antivirus software.
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- alias/ZDI-CAN-26610
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