CVE-2026-6676 — HIGH (7.8) — White Hats Nepal

Vulnerability Description

Heap buffer out-of-bounds write vulnerability in Avira Antivirus engine when scanning a malformed POSIX tar archive 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 8.3.27.12.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-787

References

https://www.gendigital.com/us/en/contact-us/security-advisories/

FAQ

What is CVE-2026-6676?

CVE-2026-6676 is a vulnerability with a CVSS score of 7.8 (HIGH). Heap buffer out-of-bounds write vulnerability in Avira Antivirus engine when scanning a malformed POSIX tar archive may allow Local Execution of Code or Denial-of-Service of the antivirus engine proce...

How severe is CVE-2026-6676?

CVE-2026-6676 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-6676?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.