The ixsso.query ActiveX Object is marked as safe for scripting, which allows malicious web site operators to embed a script that remotely determines the existence of files on visiting Windows 2000 systems that have Indexing Services enabled.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-1090
http://www.securityfocus.com/bid/1933
http://www.securityfocus.com/archive/1/144270
http://archives.neohapsis.com/archives/win2ksecadvice/2000-q4/0074.html