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Vulnerability record · CVE-2025-8351 · published 1 December 2025

CVE-2025-8351: Heap-based buffer overflow vulnerability

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.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.1% CWE-122 · Heap-based buffer overflowCWE-125 · Out-of-bounds read Deferred
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

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

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Source: NIST National Vulnerability Database (record CVE-2025-8351), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.