DirectShow in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows local users to gain privileges by leveraging control over a low-integrity process to execute a crafted application, aka "DirectShow Elevation of Privilege Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-041
http://www.securityfocus.com/bid/68392
http://www.securityfocus.com/archive/1/532800/100/0/threaded