CVE-2026-16364: Vulnerability in Mozilla Firefox
CVE-2026-16364 is a critical vulnerability in Mozilla Firefox affecting the Audio/Video Playback component due to incorrect boundary conditions. This flaw allows for potential high-impact exploitation affecting confidentiality and integrity without requiring user interaction or privileges. The issue was fixed in Firefox version 153. No known exploits in the wild have been reported. The vulnerability is also addressed in Thunderbird 153. The CVSS v3.1 base score is 9.1, indicating a critical severity level.
AI Analysis
Technical Summary
CVE-2026-16364 is a vulnerability in Mozilla Firefox's Audio/Video Playback component caused by incorrect boundary conditions, classified under CWE-119 and CWE-120. This vulnerability can be exploited remotely without authentication or user interaction, leading to high-impact consequences on confidentiality and integrity. It was fixed in Firefox 153 and Thunderbird 153. The Mozilla Foundation Security Advisory 2026-68 confirms the fix and provides detailed bug references. There are no known exploits in the wild at this time.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to compromise the confidentiality and integrity of affected systems by exploiting incorrect boundary conditions in the Audio/Video Playback component. The CVSS score of 9.1 reflects a critical impact with network attack vector, low attack complexity, no privileges required, and no user interaction needed. There is no impact on availability reported.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153 and Thunderbird 153. Users and administrators should update to these versions or later to remediate the issue. There are no additional mitigation steps required beyond applying the official update as per the Mozilla advisories.
CVE-2026-16364: Vulnerability in Mozilla Firefox
Description
CVE-2026-16364 is a critical vulnerability in Mozilla Firefox affecting the Audio/Video Playback component due to incorrect boundary conditions. This flaw allows for potential high-impact exploitation affecting confidentiality and integrity without requiring user interaction or privileges. The issue was fixed in Firefox version 153. No known exploits in the wild have been reported. The vulnerability is also addressed in Thunderbird 153. The CVSS v3.1 base score is 9.1, indicating a critical severity level.
CVSS v3.1
Score 9.1critical
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16364 is a vulnerability in Mozilla Firefox's Audio/Video Playback component caused by incorrect boundary conditions, classified under CWE-119 and CWE-120. This vulnerability can be exploited remotely without authentication or user interaction, leading to high-impact consequences on confidentiality and integrity. It was fixed in Firefox 153 and Thunderbird 153. The Mozilla Foundation Security Advisory 2026-68 confirms the fix and provides detailed bug references. There are no known exploits in the wild at this time.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to compromise the confidentiality and integrity of affected systems by exploiting incorrect boundary conditions in the Audio/Video Playback component. The CVSS score of 9.1 reflects a critical impact with network attack vector, low attack complexity, no privileges required, and no user interaction needed. There is no impact on availability reported.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153 and Thunderbird 153. Users and administrators should update to these versions or later to remediate the issue. There are no additional mitigation steps required beyond applying the official update as per the Mozilla advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:56:15.028Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbb2a4a8d5989262512
Added to database: 07/21/2026, 12:57:31 UTC
Last enriched: 07/30/2026, 04:48:55 UTC
Last updated: 09/02/2026, 22:52:09 UTC
Views: 103
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