Instructions to Reproduce:
● Lock your iPhone using a passcode
● Press Emergency Call
● Dial a non existant number #946494
● Immediately press the Power button as it begins making the call
After performing these steps the contacts application will open giving you access to the entire address book, recent call history, and voicemail of the person's iPhone.
You can also make calls and send emails.
Apple has reportedly been notified of the security bug already.
Read More [via MacStories]