The tblinf32.dll (aka vstlbinf.dll) ActiveX control for Internet Explorer 5.01 6 SP1 and 7 uses an incorrect IObjectsafety implementation which allows remote attackers to execute arbitrary code by requesting the HelpString property involving a crafted DLL file argument to the TypeLibInfoFromFile function which overwrites the HelpStringDll property to call the DLLGetDocumentation function in another DLL file aka \ActiveX Object Vulnerability.\