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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
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

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/).

Sources and references

Verified primary and authoritative sources

  • CVE-2025-14098 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-14098

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-14098 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-14098

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.