May 2026 CU for SharePoint Server 2016 is available for download

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Important: If your current farm patch level is September 2025 CU, execute the following PowerShell script to correct the folder permissions on the relevant folders otherwise installing the SharePoint fixes will fail:
Fix-SeptemberCU-Permission-Problem.ps1

Alternatively you can also remove the NT Authority\system account from WSS_WPG and IIS_IUSRS local security groups of the SharePoint machines.

For more details check this article: Trending Issue: SharePoint fixes fail to install after installation of September 2025 CU

The product group released the May 2026 Cumulative Update for SharePoint Server 2016 product family.

This CU also includes Feature Pack 1 which was released with December 2016 CU and Feature Pack 2 which was released with September 2017 CU.

The KB articles for May 2026 CU should be available at the following locations in a couple of hours:

  • KB 5002868 – May 2026 Update for SharePoint Server 2016 (language independent)
    This is also a security update!
  • KB 5002869 – May 2026 Update for SharePoint Server 2016 (language dependent)
    This is also a security update!

The downloads for May 2026 CU are available through the following links:

Important: It is required to install both fixes (language dependent and independent) to fully patch a SharePoint server. This applies also to servers which do not have language packs installed. The reason is that each SharePoint installation includes a language dependent component together with a language independent component. If additional language packs are added later (only) the language dependent fix has to be applied again.

It is irrelevant which language you pick on the drop down in download center. Even the language dependent fixes are all in the same package for all languages.

After installing the fixes you need to run the SharePoint 2016 Products Configuration Wizard on each machine in the farm. If you prefer to run the command line version psconfig.exe ensure to have a look here for the correct options.

 
SharePoint 2016 May 2026 CU Build Numbers:

Language independent fix: 16.0.5552.1002
Language dependent fix: 16.0.5552.1002

 
To understand the different version numbers please have a look at my article which explains the different SharePoint build numbers.

Please ensure to have a look at the SharePoint Patching Best Practices before applying new fixes.

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