CVE-2012-1942: The Mozilla Updater and Windows Updater Service in Mozilla Firefox 12.0, Thunderbird 12.0, and SeaMonkey 2....

Security readout for executives and security teams

CVE-2012-1942 is a local privilege escalation issue in Mozilla’s updater on Windows. A user already on the machine could cause affected Mozilla updater components to load a DLL in a privileged context, potentially gaining higher privileges. Exposure is most likely on Windows endpoints still running Firefox 12.0, Thunderbird 12.0, or SeaMonkey 2.9 with the Mozilla updater components present. Modern supported installations are not identified as affected in the supplied bundle. Treat this as a legacy-software cleanup issue unless affected versions are still present. It is not evidenced as remotely exploitable or actively exploited, but local privilege escalation on shared Windows systems can support broader compromise. Mitigation focus: Follow Mozilla advisory guidance for MFSA 2012-35 and related references.; Remove or upgrade obsolete affected Mozilla versions on Windows endpoints.; Confirm Thunderbird, Firefox, and SeaMonkey installations are supported releases..

Prepared

Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.