CVE-2025-7010: Avast antivirus stack overflow when scanning a malformed PDF file

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-12 · updated 2026-10-07
Weakness: CWE-674

Description

Stack overflow vulnerability due to uncontrolled recursion in Avast Antivirus when scanning a malformed PDF 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 25021208. 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.

Affected products

Gen Digital Avast Antivirus: before 25021208 — fixed in 25021208
Gen Digital Avast Business Antivirus: before 25021208 — fixed in 25021208
Gen Digital Avast One: before 25021208 — fixed in 25021208
Gen Digital AVG Antivirus: before 25021208 — fixed in 25021208
Gen Digital Norton Antivirus: before 25021208 — fixed in 25021208

How to fix

Upgrade to a fixed version: Gen Digital Avast Antivirus 25021208; Gen Digital Avast Business Antivirus 25021208; Gen Digital Avast One 25021208; Gen Digital AVG Antivirus 25021208; Gen Digital Norton Antivirus 25021208. Check the vendor advisory for mitigations.

References

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

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