There was nothing left until the release of the 13th generation of the iOS operating system. However, as often happens, literally a few days before it a serious security problem was discovered. One of the researchers found a way to easily circumvent iPhone security and steal sensitive data.
For an attacker, enough FaceTime and VoiceOver applications installed on the smartphone are enough for the attacker. The hacker will not be able to view your messages, as well as photo and video materials, however, the security of other data may be compromised. Apple has already responded to the vulnerability and promised to fix the problem in the next update. Well, until that moment, you can continue to use iOS 12.