A vulnerability in the way Windows handles animated cursors puts users at risk of being pwnd, and several nefarious websites are already trying to exploit the flaw, according to the SANS Internet Storm Center.
The flaw is present on virtually the entire line of Windows OSes, including Vista, which has been held up as Redmond's poster child for safe computing. According to McAfee, Windows users browsing malicious sites using IE versions 6 or 7 risk having arbitrary code run on their machines. Those using Firefox are not vulnerable. Microsoft said in an advisory that it is investigating reports of the flaw.