system
Identify the affected product in <CVE-2018-4427>.
user
Which product is affected by <CVE-2018-4427>?
assistant
The affected product is watchOS, tvOS, macOS and version: Versions prior to: watchOS 5.1.2, tvOS 12.1.1 macOS Sierra 10.12.6, macOS High Sierra 10.13.6, iOS 12.1.