Hi,
Please find more information about Cumulative Update for Microsoft Dynamics NAV released in January 2018 below.
Here you can find the download links.
Cumulative Update 1 for Microsoft Dynamics NAV 2018 has been released (Build 19846)
Cumulative Update 14 for Microsoft Dynamics NAV 2017 has been released (Build 19831)
Cumulative Update 27 for Microsoft Dynamics NAV 2016 has been released (Build 49741)
Cumulative Update 39 for Microsoft Dynamics NAV 2015 has been released (Build 49736)
Cumulative Update 51 for Microsoft Dynamics NAV 2013 R2 has been released (Build 49751)
Cumulative Update 58 for Microsoft Dynamics NAV 2013 has been released (Build 49750)