Use-after-free vulnerability in MCPlayer.dll in Microsoft Windows Media Center TV Pack for Windows Vista, Windows 7 SP1, and Windows Media Center for Windows 8 and 8.1 allows remote attackers to execute arbitrary code via a crafted Office document that triggers deletion of a CSyncBasePlayer object, aka "CSyncBasePlayer Use After Free Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-043