CVE-2026-92064: Vulnerability in Mozilla Firefox
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
AI Analysis
Technical Summary
This vulnerability involves incorrect boundary conditions in the Widget: Win32 component of Mozilla Firefox, which can lead to a sandbox escape. A sandbox escape allows malicious code to break out of the restricted execution environment, potentially leading to privilege escalation or unauthorized system access. Mozilla fixed this vulnerability in Firefox 156 and Firefox ESR 153.3, addressing the boundary condition errors that caused the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox environment in Firefox, potentially leading to higher privileges or unauthorized actions on the affected system. The vendor rates the impact as high.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official update.
CVE-2026-92064: Vulnerability in Mozilla Firefox
Description
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves incorrect boundary conditions in the Widget: Win32 component of Mozilla Firefox, which can lead to a sandbox escape. A sandbox escape allows malicious code to break out of the restricted execution environment, potentially leading to privilege escalation or unauthorized system access. Mozilla fixed this vulnerability in Firefox 156 and Firefox ESR 153.3, addressing the boundary condition errors that caused the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox environment in Firefox, potentially leading to higher privileges or unauthorized actions on the affected system. The vendor rates the impact as high.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:34:25.394Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6755bf5e2cf5d31018
Added to database: 09/15/2026, 12:47:35 UTC
Last enriched: 09/15/2026, 13:02:03 UTC
Last updated: 09/16/2026, 03:18:29 UTC
Views: 10
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