Speaking at the Black Hat conference in Las Vegas, a fellow named Barnaby Jack (really!) used custom software to hack Windows CE-based ATMs on stage. After using an industry standard key to gain entry to the machines (apparently many ATM owners are too lazy to install new locks) Jack was able to load a rootkit on the device using a USB thumb drive. From that point, it was just a matter of running another program that caused all the cash therein to shoot out in a comical manner. The machines used in the presentation were manufactured by Trannax and Triton, both of which have have had a chance to send a security patch to customers prior to the demonstration. However, there are four different machines in common use that are still vulnerable. And no, he won't tell us which ones.