"This is an advance notification of an out-of-band security bulletin that Microsoft is intending to release on March 30, 2010. The bulletin is being released to address attacks against customers of Internet Explorer 6 and Internet Explorer 7. Users of Internet Explorer 8 and Windows 7 are not vulnerable to these attacks. The vulnerability used in these attacks, along with workarounds, is described in Microsoft Security Advisory 981374. The out-of-band security bulletin is a cumulative security update for Internet Explorer and will also contain fixes for privately reported vulnerabilities rated Critical on all versions of Internet Explorer that are not related to this attack."
Microsoft Security Bulletin Advance Notification for March 2010