Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://bugzilla.mozilla.org/show_bug.cgi?id=2037979
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-106/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-108/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-109/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-110/
security@mozilla.org