CVE-2025-7002

Vulnerability

A heap buffer out-of-bounds read vulnerability exists in the Avira Antivirus engine when scanning a specially crafted PDF file. The flaw resides in the PDF parsing component of the engine and is triggered during the scan of a malformed PDF. Affected versions include Avira Antivirus on Windows, macOS, and Linux with engine builds prior to 8.3.70.68 [1].

Exploitation

An attacker can exploit this vulnerability by providing a malformed PDF file to the target system. When the Avira Antivirus engine scans the file (e.g., during on-access or on-demand scanning), the out-of-bounds read occurs. No authentication is required beyond the ability to deliver the file to the scanning engine; the attack can be triggered remotely if the user opens a malicious PDF or if the file is automatically scanned upon download.

Impact

Successful exploitation may allow an attacker to execute arbitrary code in the context of the antivirus engine process or cause a denial-of-service condition (crash of the engine). The exact privilege level achieved depends on the engine's runtime permissions, but local code execution or service disruption is possible.

Mitigation

Gen Digital (Avira) has addressed this vulnerability in engine build 8.3.70.68. Users should update their Avira Antivirus software to the latest version, which includes the fix. No workarounds are documented in the available references [1].