After today’s publishing of the newest Cumulative Update for Microsoft Dynamics NAV 2015, few hours later Microsoft published new Cumulative Updated for two older versions NAV 2013 and NAV 2013 R2, as well. There are:

• Cumulative Update 20 for Microsoft Dynamics NAV 2013 R2 and
• Cumulative Update 27 for Microsoft Dynamics NAV 2013.

You can download them from previous links, but in this moment there is some problem; I expect, it will be solved very soon. These CUs are named as Build 41371 (NAV 2013 R2) and Build 41354 (NAV 2013).