See the following URL –
Microsoft Security Bulletin Advance Notification for October 2009
Published: October 08, 2009
There are eight Critical patches for the following products: Win XPSP2 and SP3, Win 2000SP4, Server 2003SP2, Vista SP1 and SP2, IE 6, IE7 and IE8, Office Outlook 2002 and Office Outlook 2003.
See details about the patches at – http://blogs.technet.com/msrc/archive/2009/10/13/october-2009-security-bulletin-release.aspx