# CVE-2025-14098: Avira Antivirus integer overflow in scanning engine

Source: https://junglewise.ai/threats/cve-2025-14098-avira-antivirus-integer-overflow-in-scanning-engine  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-12. Updated: 2026-06-12  
License: CC BY 4.0 with a link back

CVE-2025-14098 · Severity: high · CVSS 7.8 · Published 2026-06-12

Avira Antivirus is a security suite used to protect computers from malware across Windows, macOS, and Linux. A vulnerability in its scanning engine could allow a malicious file to crash the antivirus service or potentially execute unauthorized code when the software attempts to scan it. This could lead to a loss of system protection or allow an attacker to gain deeper access to the affected machine.

Technologies: [Avira Antivirus Engine](https://junglewise.ai/threats/technologies/antivirus-engine). Vendors: [Avira](https://junglewise.ai/threats/vendors/avira).

## 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

## References

- [https://www.gendigital.com/us/en/contact-us/security-advisories/](https://www.gendigital.com/us/en/contact-us/security-advisories/)

## Related threats

- [Avira Antivirus heap out-of-bounds read in scanning engine](https://junglewise.ai/threats/cve-2025-9032-avira-antivirus-heap-out-of-bounds-read-in-scanning-engine)
- [Avira Antivirus null pointer dereference in scanning engine](https://junglewise.ai/threats/cve-2025-7018-avira-antivirus-null-pointer-dereference-in-scanning-engine)
- [Avira Antivirus out-of-bounds read in scanning engine](https://junglewise.ai/threats/cve-2025-7017-avira-antivirus-out-of-bounds-read-in-scanning-engine)