Buffer overflow in Gen Digital Avast Antivirus
CVE-2025-7019
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.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (1.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Gen Digital Avast Antivirus — versions 0
- Gen Digital Avast Business Antivirus — versions 0
- Gen Digital Avast One — versions 0
- Gen Digital Avg Antivirus — versions 0
- Gen Digital Norton Antivirus — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-7019?
- CVE-2025-7019 is a medium-severity vulnerability in Gen Digital Avast Antivirus, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-06-12.
- How severe is CVE-2025-7019?
- Medium severity. CVSS v3 base score is 5.5 out of 10.