December 2018 CU for SharePoint 2013 product family is available for download

The product group released the December 2018 Cumulative Update for the SharePoint 2013 product family.

For December 2018 CU we have full server packages (also known as Uber packages). No other CU is required to fully patch SharePoint.

As this is a common question: Yes, December 2018 CU includes all fixes from December 2018 PU.


Be aware that all Updates for SharePoint 2013 require SharePoint Server 2013 SP1 to be installed first.

Please also have a look at the article that discusses how to properly patch a SharePoint 2013 farm which has Search enabled (see below).

Previous releases of the SharePoint Server 2013 cumulative update included both the executable and the .CAB file in the same self-extracting executable download. Because of the file size, the SharePoint Server 2013 package has been divided into several separate downloads. One contains the executable file, while the others contain the CAB file. All are necessary and must be placed in the same folder to successfully install the update. All are available by clicking the same Hotfix Download Available link in the KB article for the release.

This CU includes all SharePoint 2013 fixes (including all SharePoint 2013 security fixes) released since SP1. The CU does not include SP1. You need to install SP1 before installing this CU.

The KB articles for December 2018 CU should be available at the following locations in a couple of hours:

  • KB 4461552 – SharePoint Foundation 2013 December 2018 CU
  • KB 4461555 – SharePoint Server 2013 December 2018 CU
  • KB 4461553 – Project Server 2013 December 2018 CU
  • KB 4461551 – Office Web Apps Server 2013

The Full Server Packages for December 2018 CU are available through the following links:

Important: If your farm has been on a patch level lower than July 2015 CU ensure to read the following blog post:

Be aware that the SharePoint Server 2013 CU contains the SharePoint Foundation 2013 CU. And the Project Server 2013 CU also contains the SharePoint Server 2013 CU and SharePoint Foundation 2013 CU.

Related Info:


  1. Hi Stefan,

    We are facing an issue after patching our farms with this CU.
    There are pages which have multiple content search web parts. Those web parts were working fine before the patching but post patching, all those web parts are throwing an error: Invalid Request.
    We checked that there is a content search web part related security update which is part of this CU.
    Kindly let me know how this can be fixed.



    1. Hi Mayank,
      this is not a known issue. I would recommend to open a support ticket with Microsoft to get this analyzed.


    2. Hey Mayank,

      Did you get resolution to this issue. I have just applied CU Mar 2019 and I am experiencing the same issue. In my case if I refresh the page the CSWPs work.



      1. Hey Paul D,
        In my case the December 2018 CU included a security update in which all „All existing Search Results Web Parts are automatically switched to use asynchronous loading.“ I used a Powershell snippet to retain the previous behavior for impacted pages.
        Hope this helps.



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