If you don't have the latest versions of iOS or OS X on your Apple devices, you might want to go ahead and get on that.
Discovered by a researcher from Cisco, a hacker could send you a .TIF file (which is a photo file, like .jpg) that, when received, can execute a code that gives the hacker access to your device's internal storage and stored passwords.
In order to avoid this, there are a few simple solutions for the moment: you can update your devices to the latest versions, iOS 9.3.3 or El Capitan 10.11.6, or turn off iMessage.
Apple didn't immediately respond to requests for comment.
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