Apple Support:
This update has no published CVE entries.
According to Apple's release notes, iOS 18.2.1 addresses important bugs, and it is recommended for all users.
Source:
Apple security releases - Apple Support
This document lists security updates and Rapid Security Responses for Apple software.
support.apple.com
Apple Releases iOS 18.2.1 With Bug Fixes
Apple today released iOS 18.2.1 and iPadOS 18.2.1, minor updates to the iOS 18 and iPadOS 18 operating systems. iOS 18.2.1 and iPadOS 18.2.1 come...
www.macrumors.com