Big Sur - Configure the System to Prevent the Unauthorized Disclosure of Data via Shared Resources
The information system _IS_ configured to ensure that the unauthorized disclosure of data does not occur when resources are shared. The inherent configuration of the macOS does not allow for resources to be shared between users without authorization. link:https://developer.apple.com/library/archive/documentation/Security/Conceptual/AuthenticationAndAuthorizationGuide/Permissions/Permissions.html
The technology inherently meets this requirement. No fix is required.