Cumulative Update 18 includes all application and platform hotfixes and regulatory features that have been released for Microsoft Dynamics NAV 2016. You can download the cumulative update from KB 4018438 – Cumulative Update 18 for Microsoft Dynamics NAV 2016.

Cumulative Update 05 includes all application and platform hotfixes and regulatory features that have been released for Microsoft Dynamics NAV 2017. You can download the cumulative update from KB 4018437  – Cumulative Update 5 for Microsoft Dynamics NAV 2017.