New vulnerability affecting Internet Explorer 8 users - Security Research & Defense
Today, the MSRC released Security Advisory 2794220 alerting customers to limited, targeted attacks affecting customers using Internet Explorer 6, 7, and 8. Internet Explorer 9 and Internet Explorer 10 users are safe.
Microsoft Releases Security Advisory 2794220 - MSRC
Attackers Target Internet Explorer Zero-Day Flaw - セキュリティホール memo
XP ユーザはIEを使うなと。