CVE-2025-8351

Avira antivirus engine heap buffer OOB read when scanning a malformed file

State: Published
Severity: 7.8 High
Published: Dec 1, 2025
Updated: Jun 12, 2026
Reserved: Jul 30, 2025

Description

Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avira Antivirus engine when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.

This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.70.98.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	GEN

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
Avira AntivirusGen Digital	before 8.3.70.98Affected

References

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

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