Microsoft Windows 7 SP1 Windows Server 2008 SP2 and R2 SP1 Windows 8.1 and Windows RT 8.1 Windows Server 2012 and R2 Windows 10 Gold 1511 1607 1703 and Windows Server 2016 allows an elevation of privilege vulnerability due to Kerberos falling back to NT LAN Manager (NTLM) Authentication Protocol as the default authentication protocol aka \Windows Elevation of Privilege Vulnerability\.