Gen Digital Avast Antivirus up to 25020100 on Windows XML File stack-based overflow

Summaryinfo

A vulnerability was found in Gen Digital Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One and Avast Business Antivirus up to 25020100 on Windows. It has been declared as critical. The impacted element is an unknown function of the component XML File Handler. The manipulation results in stack-based overflow. This vulnerability is known as CVE-2025-7019. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Gen Digital Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One and Avast Business Antivirus up to 25020100 on Windows. Affected is some unknown processing of the component XML File Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on availability. CVE summarizes:

Stack overflow vulnerability in Avast Antivirus when scanning a malformed Office Open XML file may allow Denial-of-Service of the antivirus process. This issue affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25020100. The affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream.

The advisory is shared for download at gendigital.com. This vulnerability is traded as CVE-2025-7019 since 07/02/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability. Applying the patch 25020100 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-210133). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Anti-Malware Software

Vendor

• Gen Digital

Name

• Avast Antivirus
• Avast Business Antivirus
• Avast One
• AVG Antivirus
• Norton Antivirus

Version

License

• free

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Once again VulDB remains the best source for vulnerability data.

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