XML Core Services (aka MSXML) 3.0 in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote attackers to execute arbitrary code or cause a denial of service (system-state corruption) via crafted XML content, aka "MSXML Remote Code Execution Vulnerability."