Update your iPhone software soon, otherwise…
By Tyler Bohn of Cisco Telos Said Users can receive this file through MMS or email, or it can also enter the system by visiting suspicious pages.
Operating system vulnerabilities can be exploited through TIFF (Tagged Image File Format), BMP, DAE, and OpenEXR image formats. TIFF and BMP formats can affect OS X, iOS, watchOS, and tvOS. OpenEXR and DAE can affect OS X machines.
The good thing for the users using these operating systems of Apple is that the company has removed this deficiency through the latest version iOS 9.3.3, OS Has given. If you are using a version older than this, our suggestion would be to update to the latest version as soon as possible.
Regarding this shortcoming, Bohan said, “Image files serve as a convenient medium because they are very easy to distribute through web and email traffic.”