[German]On August 12, 2025 (the second Tuesday of the month, Microsoft's patch day), various cumulative updates were released for the supported versions of Windows Server. Below, I have listed the updates provided, along with some details for these Windows Server versions (from Windows Server 2012 to 2025).
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The updates listed below address the vulnerabilities described in Microsoft Security Update Summary (August 12, 2025) that are relevant to Windows Server.
Updates for Windows Server 2025
A list of updates for Windows Server 2025 can be found on this Microsoft website. The cumulative update KB5063878 has been released for Windows Server 2025, which includes the security patches described in the support article and the following fixes.
This update is automatically downloaded and installed by Windows Update, but is also available in the Microsoft Update Catalog and via WSUS and WUfB. The current Windows Servicing Stack Update is integrated into the patch. Any problems caused by the update and installation requirements are listed in the support article.
Updates for Windows Server 2022/23H2
The following updates are available for Windows Server 2022 and Windows Server 23H2.
Update KB5063899 for Windows Server 23H2
A list of updates for Windows Server 23H2 can be found on this Microsoft website. The cumulative update KB5063899 has been released for Windows Server 23H2, which includes the security patches described in the support article.
This update is automatically downloaded and installed by Windows Update, but is also available in the Microsoft Update Catalog and via WSUS and WUfB. The current Windows Servicing Stack Update is integrated into the patch. Any problems caused by the update (Citrix) and installation requirements are listed in the support article.
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Update KB5063880 for Windows Server 2022
A list of updates for Windows Server 2022 can be found on this Microsoft website. The cumulative update KB5063880 has been released for Windows Server 2022, which includes security patches and those described in the support article.
This update is automatically downloaded and installed by Windows Update, but is also available in the Microsoft Update Catalog and via WSUS and WUfB. The current Windows Servicing Stack Update is integrated into the patch. Any problems caused by the update and installation requirements are listed in the support article.
Updates for Windows Server 2016/2019
A list of updates for Windows Server 2016 and 2019 can be found on this Microsoft website. I have extracted the relevant update information below.
Update KB5063877 for Windows Server 2019
Cumulative Update KB5063877 is not only available for Windows 10 2019 Enterprise LTSC etc., but also for Windows Server 2019. The update includes the security fixes described in the support article, as well as improvements and bug fixes (switch to the Server 2019 tab).
The update is automatically downloaded and installed by Windows Update, but is also available in the Microsoft Update Catalog, via WSUS, and WUfB. Microsoft has also updated the Service Stack Update (SSU). Please note the installation sequence described in the support article, as well as any notes on additional requirements and potential issues.
Update KB5063871 for Windows Server 1607
Cumulative Update KB5063871 is available not only for Windows 10 2016 Enterprise LTSC, but also for Windows Server 2016. The update includes security fixes, bug fixes, and improvements, which may be listed in the support article.
The update is automatically downloaded and installed by Windows Update, but is also available in the Microsoft Update Catalog, via WSUS, and WUfB. Microsoft has also updated the Service Stack Update (SSU). Please note the installation requirements described in the support article and any references to existing issues.
Updates for Windows Server 2012 / R2
Windows Server 2012/R2 will no longer be supported as of October 2023 and will only receive updates with an ESU license. Please note the instructions on the installation sequence for Windows Server provided by Microsoft in the KB articles. The installation of this extended security update (ESU) may fail if installed on an Azure Arc-enabled device.
Update KB5063950 for Windows Server 2012 R2
The update history for Windows Server 2012 R2 can be found on this Microsoft page. Update KKB5063950 (Monthly Rollup for Windows Server 2012 R2) has been released for Windows Server 2012 R2 for systems with an ESU license. The update eliminates various vulnerabilities and includes internal, undocumented fixes.
This update is automatically downloaded and installed by Windows Update in Windows Server 2012 R2, but is also available in the Microsoft Update Catalog and via WSUS. Details about fixes and any known issues related to the update are listed in the support article.
Update KB5063906 for Windows Server 2012
The update history for Windows Server 2012 can be found on this Microsoft page. Update KB5063906 (Monthly Rollup for Windows Server 2012) has been released for Windows Server 2012 with an ESU license. It contains unspecified security patches and bug fixes.
This update is available in the Microsoft Update Catalog and via WSUS. For manual installation, the latest Servicing Stack Update (SSU) must be installed first – this SSU cannot be uninstalled. Problems related to the update are listed in the KB article.
If in doubt, details on the above updates can be found in the respective Microsoft KB articles.
Similar articles:
Microsoft Security Update Summary (August 12, 2025)
Patchday: Windows 10/11 Updates (August 12, 2025)
Patchday: Windows Server Updates (August 12, 2025)
Patchday: Microsoft Office Updates (August 12, 2025)
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