What’s Vulnerable › Vulnerabilities
CVE-2025-8351: Avira antivirus engine heap buffer OOB read when scanning a malformed file
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-01 · updated 2026-06-17
- Weakness: CWE-122
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.
Affected products
- Gen Digital Avira Antivirus: before 8.3.70.98 — fixed in 8.3.70.98
How to fix
Upgrade to a fixed version: Gen Digital Avira Antivirus 8.3.70.98. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2025-8351 or the next vulnerability affects your stack