The host is installed with Apple Mac OS X Mountain Lion 10.8 through 10.8.4 and is prone to security bypass vulnerability. The flaw is present in the Power Management in Apple Mac OS X before 10.8.5, which does not properly perform locking upon occurrences of a power assertion. Successful exploitation allows physically proximate attackers to bypass intended access restrictions by visiting an unattended workstation on which a locking failure had prevented the startup of the screen saver.