Microsoft Security Advisory (2887505)
Microsoft is investigating public reports of a vulnerability in all supported versions of Internet Explorer. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability in Internet Explorer 8 and Internet Explorer 9. Applying the Microsoft Fix it solution, "CVE-2013-3893 MSHTML Shim Workaround," prevents the exploitation of this issue. See the Suggested Actions section of this advisory for more information.
Security Advisory 2887505 and Microsoft Fix it solution
Official Microsoft Fix it