CVE-2026-16395 is an integer overflow vulnerability affecting the Audio/Video component of Mozilla Firefox. The flaw could lead to severe security impacts including complete compromise of confidentiality, integrity, and availability. Mozilla fixed this vulnerability in Firefox 153 as part of a broader security update addressing multiple high-impact issues. The vulnerability is tracked under CWE-190 (Integer Overflow or Wraparound). There are no known active exploits in the wild. The vendor advisory confirms the fix and recommends upgrading to Firefox 153 or later.

The integer overflow vulnerability in the Audio/Video component can be exploited remotely without user interaction or privileges, resulting in high impact on confidentiality, integrity, and availability of the affected system. This could allow attackers to execute arbitrary code or cause denial of service. However, no known exploits have been observed in the wild so far.

Mozilla has released an official fix for this vulnerability in Firefox 153. Users and administrators should upgrade affected Firefox installations to version 153 or later to remediate this issue. Since this is not a cloud service, patching the client software is required. There are no vendor advisories indicating that no action is required or that the issue is already mitigated without patching.