A lock screen issue allowed access to contacts on a locked device. This issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1. A person with physical access to an iOS device may be able to access contacts from the lock screen.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
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https://support.apple.com/en-us/HT211931 | release notes vendor advisory |