A flaw in Apple's iOS 7 lock screen allows users to call any number from their iPhone's emergency-call feature.
Forbes revealed the bug after reporter Andy Greenberg was sent a video of a locked iPhone running iOS 7.
The bug can be activated by hitting the "Emergency" button on the iPhone's lock screen. Dial any number, then rapidly hit the green call button until you see the Apple logo screen -- the same screen that comes up when the phone is turned on. The phone will begin to ring, and your call should connect.
Mashable was able to replicate this on two different iPhone 5 models running iOS 7.
The bug was not repeatable on an iPhone 5S, which is running iOS 7.0.1 (what the phone is shipped with).
We've reached out to Apple, and will update this story with comment on a security update.
Is your iPhone experiencing problems with this iOS 7 bug? Tell us in the comments, below.