This message was posted on behalf of Intel Corporation
Thank you for contacting us regarding the latest BIOS update for our Intel® NUC Kit NUC6i7KYK, it will be more than a pleasure to assist you out with all the information that you may need.
As a matter of fact the Version: 0051 (Latest) was released back in 1/10/2018 and here you will find all the details about it and the release notes:
In case that you need it, here you will find 5 ways to perform a BIOS update:
I hope this helps,