Apple has released iOS 15.5 with fixes for critical vulnerabilities that could be exploited to take control of a vulnerable device.
Users should update as soon as possible to avoid potential exploitation.
Updates for iPadOS, WatchOS, and tvOS should also be installed.
Important links:
How to update iOS
iOS 15.5 Release Notes
How to update watchOS
watchOS 8.6 Release Notes
How to update tvOS
tvOS 15.5 Release Notes