Mitigation bypass in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://bugzilla.mozilla.org/show_bug.cgi?id=2067531
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-90/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-93/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-94/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-96/
security@mozilla.org