Advisory Published

ZDI-CAN-26610: 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 SoftwareAffected VersionHow to fix
Avast Antivirus

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Frequently Asked Questions

  • What is the severity of ZDI-CAN-26610?

    The ZDI-CAN-26610 vulnerability has a critical CVSS rating due to its ability to allow privilege escalation on affected systems.

  • How do I fix ZDI-CAN-26610?

    To fix ZDI-CAN-26610, users should update their Avast Free Antivirus to the latest version provided by the vendor.

  • Who is affected by ZDI-CAN-26610?

    ZDI-CAN-26610 affects users of Avast Free Antivirus who have not applied the necessary security updates.

  • What type of exploit is involved in ZDI-CAN-26610?

    ZDI-CAN-26610 involves a local code execution exploit that allows attackers to escalate their privileges.

  • What should I do if I cannot update Avast Free Antivirus due to ZDI-CAN-26610?

    If you cannot update Avast Free Antivirus, consider temporarily disabling it and running alternative security measures until the update can be applied.

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