Cumulative Update 12 includes all application and platform hot fixes and regulatory features that have been released for Microsoft Dynamics NAV 2016.
The cumulative update is intended mainly for solutions that are experiencing the problems described in the Knowledge Base article linked to below. However, you are advised to always keep your solution updated with the latest cumulative update. If you are in doubt about whether this cumulative update addresses your specific problem, or if you want to confirm whether any special compatibility, installation, or download issues are associated with this cumulative update, support professionals in Customer Support Services are ready to help you. For more information, see http://support.microsoft.com/contactus/.
The cumulative update includes hot fixes that apply to all countries and hotfixes specific to the following local versions:
You can download the cumulative update from KB 3193868 – Cumulative Update 12 for Microsoft Dynamics NAV 2016 (Build 47042)
Original Source :- Microsoft Blog