Use-after-free vulnerability in Microsoft Internet Explorer 6, 6 SP1, 7, and 8 on Windows 2000 SP4; Windows XP SP2 and SP3; Windows Server 2003 SP2; Windows Vista Gold, SP1, and SP2; Windows Server 2008 Gold, SP2, and R2; and Windows 7
"Microsoft thanks the following companies for working with us and for providing details of limited, targeted attacks against customers of Internet Explorer 6:
Google Inc. and MANDIANT;
Adobe;
McAfee;
French government CSIRT (CERTA)"