The Netlogon service in Microsoft Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT 8.1 improperly establishes secure communications channels, which allows local users to gain privileges by leveraging access to a domain-joined machine, aka "Netlogon Elevation of Privilege Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-101