Yesterday Apple released macOS, iOS, iPadOS and WatchOS updates and you should run them immediately. The patch brings macOS Ventura to version 13.5.2, iOS to version 16.6.1, iPadOS to 16.6.1, and watchOS to 9.6.2.
They are fixes for zero-day security vulnerabilities that have been found across Macs, iPhones, iPads and watches. It’s believed that there have been zero-click attacks delivered via iMessage, so it’s part of a very dangerous campaign.