KLA10013
OSI vulnerability in multiple Microsoft XML Core Services

By exploiting this vulnerability malicious users can obtain sensitive information. This vulnerability can be exploited from the network at a point related to MSXML via a specially designed website. It is caused by a missing property information restriction.

Windows Server 2003 SP2 x86, x64, for Itanium
Windows Vista SP2 x86, x64
Windows Server 2008 SP2 x86, x64, for Itanium
Windows 7 SP1 x86, x64
Windows Server 2008 R2 SP1 x64, for Itanium
Windows 8 x86, x64 Windows 8.1 x86, x64
Windows Server 2012, 2012 R2
Windows RT & Windows RT 8.1  

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)