23 July 2021
Apple has pushed a new iOS 12.5.4 security update for older-generation devices. It is aimed at those iPhone, iPad, and iPod Touch models that stopped receiving software updates with the iOS 13 release. This is an important security update for everyone who is still using any of those old devices to ensure their online safety.
The update fixes three vulnerabilities and two of them may have been exploited. The issues are mainly related to memory corruption and WebKit. Apple has described the impact of these issues as "processing a maliciously crafted certificate may lead to arbitrary code execution". This is the reason it is a recommended update from Apple's perspective.
The list of devices receiving the update includes iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation). The rollout is similar to any other update where you will get a notification on the device. It can also be checked manually by visiting Settings -> General -> Software Update.
Like every other software update, it is advised that you connect to a WiFi connection before starting the download. It is also recommended to have at least 50% juice left on the device before installing it. if the charging is below this mark, you can always install it after plugging the device into a power source.