Windows Server 2016 Build 14393.970 (ENU) is a cumulative update that was released on April 11, 2017. The update is also known as KB4015217 and is applicable to Windows Server 2016 systems with the English (United States) language pack installed.
Notable CVEs fixed in that build:
By 2021, to secure this build you would need . Running 14393.970 in 2021 would leave the server vulnerable to: windows server 2016 build 14393970 enus april 2017 2021
The support lifecycle for Windows Server 2016 Build 14393.970 is an important consideration for organizations that rely on this build. Microsoft provides mainstream support for Windows Server 2016 for five years from the general availability date, which was October 12, 2016. Extended support is available for an additional five years. Therefore, support for Build 14393.970 (en-US) ended on January 11, 2022, after which only security updates were provided. Windows Server 2016 Build 14393
If you found yourself on 14393.970 in 2021 or later, you had two primary paths: Running 14393