PatchSiren cyber security CVE debrief

CVE-2025-14098 Gen Digital CVE debrief

A heap buffer out-of-bounds write vulnerability due to integer overflow in Avira Antivirus engine when scanning a malformed MS-DOS executable 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 8.3.70.104.

Vendor: Gen Digital
Product: Avira Antivirus
CVSS: HIGH 7.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-12
Original CVE updated: 2026-06-12
Advisory published: 2026-06-12
Advisory updated: 2026-06-12

Who should care

Users of Avira Antivirus on Windows, macOS, and Linux with engine builds before 8.3.70.104 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. It is caused by an integer overflow in the Avira Antivirus engine when scanning a malformed MS-DOS executable file, leading to a heap buffer out-of-bounds write.

Defensive priority

High

Recommended defensive actions

Update Avira Antivirus engine to version 8.3.70.104 or later.

Evidence notes

The CVE record was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2025-14098). The vulnerability details were obtained from [nvd](https://nvd.nist.gov/vuln/detail/CVE-2025-14098). Additional information can be found at [ref-4](https://www.gendigital.com/us/en/contact-us/security-advisories/).

Official resources

CVE-2025-14098 was published on 2026-06-12T23:16:27.350Z.