Microsoft downplayed the threat posed to Windows users by a recently-revealed vulnerability, saying that it was unlikely the bug could be exploited to compromise a computer.

The flaw in the Windows Server Message Block (SMB) network and file-sharing protocol was disclosed Monday by someone identified only as " Cupidon-3005" on the Full Disclosure security mailing list. Cupidon-3005 posted proof-of-concept code to the list.

French and Danish researchers later said hackers might be able to exploit the bug to hijack Windows PCs. (See also "25 Years: Windows' Worst Moments")

More: http://www.pcworld.com/article/220059/