An information disclosure issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iTunes for Windows 12.10.9, iCloud for Windows 11.5, tvOS 14.0. A remote attacker may be able to leak memory.
https://support.apple.com/en-us/HT211952
https://support.apple.com/en-us/HT211935
https://support.apple.com/en-us/HT211931
https://support.apple.com/en-us/HT211850
https://support.apple.com/en-us/HT211844