Who knew that owning a ZTE Score M would mean living life on the edge? ZTE has confirmed that the MetroPCS phone has a backdoor vulnerability which could let a less-than-scrupulous hacker get root-level control over the Android 2.3 phone -- and because it's a unique app baked into the firmware, the login credentials won't change as long as the exploit survives. Other ZTE phones, like the Skate, supposedly face the same hole as well. The company says it should have a patch ready to push over the air in the "very near future," but it hasn't said why the app existed in the first place. Either way, if you currently pocket the Score M or one of ZTE's other recent Android devices, we'd keep watch for any suspicious goings-on until a fix is in place.