CVE-2025-8351 — CRITICAL (9.0)

Vulnerability Description

Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avast Antivirus on MacOS when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the anitvirus engine process.This issue affects Antivirus: from 8.3.70.94 before 8.3.70.98.

CVSS Score

9.0

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-122 CWE-125

References

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

FAQ

What is CVE-2025-8351?

CVE-2025-8351 is a vulnerability with a CVSS score of 9.0 (CRITICAL). Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avast Antivirus on MacOS when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the anitvirus engine p...

How severe is CVE-2025-8351?

CVE-2025-8351 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2025-8351?

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