Apple has now released the iOS 12.5.6 update for older iPhone, iPod touch and iPad models that are not compatible with the current iOS version, iOS 15.
The update can be downloaded over-the-air as usual by opening the Settings app, tapping “General” and selecting the “Software Update” option.
iOS 12.5.6 is highly recommended
The iOS 12.5.6 update fixes a major security flaw that was actively exploited, so it's worth updating immediately if you have an older device. The WebKit vulnerability has already been fixed with the iOS 15.6.1, iPadOS 15.6.1, and macOS Monterey 12.5.1 updates. Devices that cannot be updated beyond iOS 12 include the iPhone 5S, iPhone 6, iPhone 6 Plus, iPod touch 6, the original iPad Air, iPad mini 2, and iPad mini 3. (Photo by cincila / Bigstockphoto)