I usually did not post this information as this pretty simple to get it; however, I’m making exception for this one as this is a really important one.
As you may be aware, Exchange 2016 is coming soon. So, what about the relation with this Exchange 2013 CU10 and Exchange 2016? Well, if you are (already) planning to deploy Exchange 2016 in your environment, you will need to have patched your Exchange 2013 servers with (at least) this cumulative update; if not, you will not be able to install Exchange 2016.
So be prepared for Exchange 2016 and deploy it as soon as possible