Two days after publishing of the newest Cumulative Update for Microsoft Dynamics NAV 2015, Microsoft has published new Cumulative Updates for two older versions NAV 2013 and NAV 2013 R2, as well. There are:

• Cumulative Update 21 for Microsoft Dynamics NAV 2013 R2 and
• Cumulative Update 28 for Microsoft Dynamics NAV 2013.

You can download them from previous links. These CUs are named as Build 41768 (NAV 2013 R2) and Build 41767 (NAV 2013). You can see that these CUs have both Platform and Application hotfixes. The most of Application hotfixes are for NAV 2013 R2 and only three of them for NAV 2013.