Apple has released iOS 14.4.2, iPadOS 14.2.2, and watchOS 7.3.3. All address security issues.
You can obtain iOS 14.4.2 and iPadOS 14.4.2 by going to System Preferences > Software Update on your iPhone or iPad.
watchOS 7.3.3 can be download by going to the Apple Watch app on your iPhone and selecting General > Software Update. To install the operating system update, the Apple Watch battery needs to be at least 50%, be placed on a charger, and within range of your iPhone.