ActiveX controls are a component of Internet Explorer but are widely used in other Windows software products including Office. Risk is high. A bug in the Java virtual machine supplied by Microsoft allows a Java applet to override Java security. Applets can alter or remove any file. Java applets are included in many web pages.
Risk is high.
A bug in Microsoft Office '97 and Office 2000 allows a carefully constructed web page or e-mail attachment to take any action such as file removal or modification. Eudora as well as Microsoft's Outlook and Internet Explorer are vulnerable to this bug. Risk is high. Let me know.