Quick answers
- Is CVE-2025-14098 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-14098 being exploited in the wild.
- How severe is CVE-2025-14098?
- High severity, with a CVSS score of 7.8, published 12 June 2026.
- Which products and versions are affected?
- Avira Antivirus Engine before 8.3.70.104.
- Is there a fix for CVE-2025-14098?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2025-14098 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2025-14098?
- Check whether you run Avira Antivirus Engine at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer out-of-bounds write vulnerability exists in the Avira Antivirus engine due to an integer overflow (CWE-190) triggered during the parsing of malformed MS-DOS executable files. The flaw resides in the engine's file scanning component across Windows, macOS, and Linux platforms. An attacker can exploit this by providing a specially crafted executable that, when scanned, causes an out-of-bounds write (CWE-787). Successful exploitation requires user interaction (e.g., downloading or opening a folder containing the file) and can result in local code execution or a denial-of-service (DoS) of the antivirus process. The issue is resolved in engine builds 8.3.70.104 and later.
Affected products
- Avira Antivirus engine before 8.3.70.104
Timeline
- 2026-06-12: disclosed
- 2026-06-12: advisory