Update for SharePoint Server 2016 (May 2021 CU)

A new cumulative update for SharePoint Server 2016 has been released (May 2021 CU).
This CU includes both Feature Pack 2, which has been included since the September CU (September 2017 CU), and the previous Feature Pack 1.

SP Build:
16.0.5161.1000 (Language independent CU)

SharePoint 2016 CU – KB articles describing the CU:

• KB 5001917 – May 2021 Update for SharePoint Server 2016 (language independent)
• This CU does not include an update to language-dependent components for SharePoint Server 2016 (the most recent language-dependent component update is KB 4504723)

SharePoint Server 2016 CU – CU download link:

• Download May 2021 Update for SharePoint Server 2016 (language independent)
• This CU does not include an update to language-dependent components for SharePoint Server 2016 (the most recent language-dependent component update is KB 4504723)

After installation, remember to run the SharePoint 2016 Products Configuration Wizard (SharePoint 2016 Products Configuration Wizard), or the following command:

PSConfig.exe -cmd upgrade -inplace b2b -wait -cmd applicationcontent -install -cmd installfeatures -cmd secureresources -cmd services -install

Notice

Feature Pack 2 also includes all functionality from Feature Pack 1.

Always install both packages in this order:

1. language independent (updates language-independent components)
2. language dependent (updates language-dependent components)

For language-dependent packages, it does not matter which language you select, as each package contains updates for all languages.

If you install a new language pack on your SharePoint Server 2016 farm, you must then reinstall the language-dependent update package.

Remember that Distributed Cache must also be updated alongside SharePoint; see How to update Distributed Cache correctly and for Office Online Server, you must have the current RTM release; see  How to update Office Online Server.

Included fixes and improvements

The fixes and improvements listed for this CU are excerpts from official Microsoft KB articles in their original language (EN).

SharePoint Server 2016

This security update resolves a Microsoft Word remote code execution vulnerability and SharePoint Denial of Service Update. To learn more about the vulnerabilities, see the following security advisories:

• Microsoft Common Vulnerabilities and Exposures CVE-2021-26418
• Microsoft Common Vulnerabilities and Exposures CVE-2021-28474
• Microsoft Common Vulnerabilities and Exposures CVE-2021-28478
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31171
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31172
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31173
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31181

This update contains a fix for the following nonsecurity issue in SharePoint Server 2016:

• Fixes an issue in which SharePoint Designer doesn’t work well on the site that disables the Wiki Home Page feature.

This update also contains a fix for the following nonsecurity issue in Project Server 2016:

• The Export to Excel function doesn’t work for the Capacity and Engagements Heatmap view on the Capacity Planning page.