The Windows font library in 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; Windows RT Gold and 8.1; Office 2007 SP3; Office 2010 SP2; Word Viewer; .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, and 4.6; Skype for Business 2016; Lync 2010; Lync 2013 SP1; Live Meeting 2007 Console; and Silverlight 5 allows remote attackers to execute arbitrary code via a crafted embedded font, aka "Graphics Memory Corruption Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-128
http://www.securitytracker.com/id/1034336
http://www.securitytracker.com/id/1034333
http://www.securitytracker.com/id/1034332
http://www.securitytracker.com/id/1034331