Updates for SharePoint Server Subscription Edition (August 2025 CU)

17 August 2025    |    Comments   Comments: 0

A new cumulative update (August 2025 CU) has been released for SharePoint Server Subscription Edition.

SP Build:
16.0.18526.20518

Starting with the March 2023 CU, updates for SharePoint Server Subscription Edition are released as a single package (known as an Uber package) containing both language-independent and language-dependent fixes. Only one package needs to be installed to fully update the server.

SharePoint Subscription Edition CU – KB articles describing the CU:

  • KB 5002773 – August 2025 Update for SharePoint Server Subscription Edition

SharePoint Server Subscription Edition CU – CU download links:

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

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

Important notes

To speed up CU installation, I recommend following the guidance in How to speed up CU installation in SharePoint Server Subscription Edition.

The language you select when downloading the update does not matter because the same package is downloaded for every language.

Note for this CU:

Installing this update requires the release version of SharePoint Server Subscription Edition.

Calendar overlay configuration may fail with Invalid EWS URL: <url> in CalendarService.ashx and ULS events 583ga or apmev. Exchange Web Service URLs are blocked by default for security. After verifying the blocked URL is safe, a farm administrator can allow its host through AllowedSafeDomain using the following commands. Replace the host placeholder with the relevant host. See KB5064829.

add-pssnapin *
$f=get-spfarm
$f.AllowedSafeDomain.Add("<host>")
$f.update()

Included fixes and improvements

The following overview summarizes the fixes and improvements in this CU based on the official Microsoft KB articles.

SharePoint Server Subscription Edition

This CU addresses an elevation of privilege vulnerability: CVE-2025-53760.

The unified update in KB 5002773 includes these SharePoint Server Subscription Edition changes:

  • Improves searching in People Picker.

  • Improves performance of the new hybrid search.

  • Registers Microsoft.Data.SqlClient as the SQL provider for SharePoint Search Service.

  • Adds a property pane toggle for hiding the command bar of List and Document Library web parts.

  • Adds a warning before deleting a Cloud Search Service Application (Cloud SSA) when users have not confirmed removal of the hybrid indexes.

  • Fixes rendering issues affecting the GB18030 character set.

  • Fixes an issue where the LanguageSynchronization timer job fails to execute.

  • Fixes an issue where Excel previews are missing from SharePoint search results.

  • Fixes an issue where NodeRunner.exe stops responding with a System.AccessViolationException.

  • Fixes an issue where filtering a Managed Metadata column disables filtering on other columns.

  • Fixes an issue where files cannot be copied or moved to folders containing Private Use Area (PUA) characters.

  • Fixes an issue where an External List using a Business Data Connectivity (BDC) connection shows no data.

  • Fixes an issue where clearing one column’s filter prevents clearing filters on the other columns.

  • Fixes an issue where moving a file between document libraries can incorrectly update its Editor field.

  • Fixes an issue where uploaded .one files cannot open after March 2025 KB5002698 is installed.

  • Fixes an issue where Central Administration leaves Configure usage and health data collection untranslated in Simplified Chinese (zh-CN).

  • Fixes an issue where modern communication site pages show their publication date in US format instead of the expected regional format.

  • Fixes an issue where DLP policy tips and Override and Report actions can fail on subsites of site collections that are not at the web application’s root.

  • Fixes an issue where BCS cannot use DotNetAssembly or WebService system types because they are disabled by default. If you trust the BDC models based on these types, enable support in SharePoint Management Shell:

    $farm = Get-SPFarm
$farm.ServerDebugFlags.Add(57007)
$farm.ServerDebugFlags.Add(57008)
$farm.update()
iisreset

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