Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allow attackers to bypass an application sandbox protection mechanism and perform unspecified registry actions via a crafted application, aka "Windows Registry Elevation of Privilege Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-090
http://www.zerodayinitiative.com/advisories/ZDI-15-459
http://www.zerodayinitiative.com/advisories/ZDI-15-380