Windows Shell and WordPad in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7; Microsoft Office XP SP3; Office 2003 SP3; and Office System 2007 SP1 and SP2 do not properly validate COM objects during instantiation, which allows remote attackers to execute arbitrary code via a crafted file, aka "COM Validation Vulnerability."