It's not just Windows XP that is vulnerable to the Remote Desktop Protocol flaw, but also Windows 2000 and Windows Server 20003
http://chkpt.zdnet.com/chkpt/ukzdfeed/http://news.zdnet.co.uk/0,39020330,39209674,00.htm
http://chkpt.zdnet.com/chkpt/ukzdfeed/http://news.zdnet.co.uk/0,39020330,39209674,00.htm