Revision Note: V1.3 (January 11, 2011): Revised the workaround, Prevent the recursive loading of CSS style sheets in Internet Explorer, to add the impact for the workaround. Advisory Summary:Microsoft is investigating new, public reports of limited attacks attempting to exploit a vulnerability in all supported versions of Internet Explorer. The main impact of the vulnerability is remote code execution. This advisory contains workarounds and mitigations for this issue.