The December 2014 Cumulative Update for SharePoint 2013 contains numerous hotfixes and improvements for SharePoint Foundation 2013 and SharePoint Server 2013. The cumulative update package is multilingual and contains updates for all languages.

Before you start
Since June 2014 the Cumulative Updates for SharePoint products releases on a monthly basis.
This cumulative update includes all patches since the RTM release, but not the Service Pack 1. You may install the Service Pack 1 before or after installing this cumulative update. Read how-to install Service Pack 1.
Because of the file size the cumulative update package has been divided in three parts; ubersrv.exe, ubersrv_1.cab and ubersrv_2.cab. You have to put them all in the same folder.

Installation instructions

  • Create a SharePoint Farm Backup.
  • Download all SharePoint Foundation and SharePoint Server packages.
  • Extract the previously downloaded files with a double-click.
  • Click «Continue»
  • Define the path in which you would like to extract the installation binaries and click OK. Use the same destination path for the other files.
  • Run the extracted EXE file as administrator.
  • Accept the license terms and click «Continue».
  • Repeat the previous two steps for the other EXE files in this folder.
  • Apply the updates to each SharePoint server in the farm.
  • As soon as the installation of the cumulative update has finished on all servers, run the SharePoint Configuration Wizard successively on each SharePoint server in the farm.
  • Restart the User Profile Service on affected servers.

Hotfix KB2910945 for SharePoint Foundation 2013: December 9, 2014
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Description of the SharePoint Foundation 2013 update package

Hotfix KB2910938 for SharePoint Server 2013: December 9, 2014
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Description of the SharePoint Server 2013 update package

Hotfix KB2910911 for Project Server 2013: December 9, 2014
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Description of the SharePoint Server 2013 with Project Server 2013 update package

Hotfix KB2899574 for Office Web Apps Server 2013: December 9, 2014
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Description of the SharePoint Server 2013 update package

SharePoint 2013 update portal
http://technet.microsoft.com/en-us/sharepoint/ee748587.aspx