The host is installed with Microsoft Windows Server 2003 SP2, Vista SP2, Server 2008 SP2, Windows 7 SP1, Server 2008 R2 SP1, Windows 8, Windows 8.1, Server 2012 or Server 2012 R2 and is prone to a Win32k buffer overflow vulnerability. A flaw is present in the application, which fails to properly validate user input. Successful exploitation allows remote attackers to gain elevated privileges.