According to the TechNet SharePoint updates page, there is a SharePoint Server 2010 CU for December 2016 KB3118036
https://technet.microsoft.com/en-us/library/mt715807(v=office.16).aspx#BKMK_2010
https://support.microsoft.com/kb/3118036 - broken link
What is the latest SharePoint 2010 CU and where can it be downloaded from?