A security researcher at Juniper Networks says he plans to demonstrate a new class of attack that can be used to compromise electronic devices like routers or mobile phones. The vulnerability lies in the ARM and XScale microprocessors, two chips that are widely used in these “embedded” devices. “There are interesting quirks in the ARM and XScale architectures that make things very easy for an attacker,” said Juniper’s Barnaby Jack. The technique he has developed is “100 percent reliable, and it results in code execution on the device,” he said.