None of the contestants were able to hack into the provided U810, MacBook Air, or Sony Vaio on the first day of the contest, when the rules were at their strictest, but as soon as the hackers were allowed to lure judges into opening attachments or visiting malicious websites, the MacBook Air found itself defenseless. Whether the U810 could have been hacked into just as easily is unknown.
[LinuxWorld via CrunchGear]