The SharePoint 2013 September 2016 Cumulative Updates have been released:
SharePoint Foundation: https://support.microsoft.com/en-us/kb/3118271
SharePoint Server 2013: https://support.microsoft.com/en-us/kb/3118279
Project Server 2013: https://support.microsoft.com/kb/3118274
Office Web Apps 2013: https://support.microsoft.com/en-us/kb/3118270
Office Updates: https://support.microsoft.com/en-us/kb/3118274
Consider using the SharePoint Patch Cmdlets available at SharePoint Updates for your farm!
