MS KB2488013: Internet Explorer CSS Import Rule Processing Arbitrary Code Execution
High Nessus Plugin ID 51587
Arbitrary code can be executed on the remote host through a web browser.
The remote host is missing one of the workarounds referenced in KB 2488013. The remote version of IE reportedly fails to correctly process certain specially crafted Cascading Style Sheets (CSS), which could result in arbitrary code execution on the remote system.