Note
- Original publish date: October 24, 2025
- KB ID: 5071205
Windows Server containers
This out-of-band (OOB) update addresses the following known issue:
- [Windows Server Update Services (WSUS)] Fixed: This update addresses a remote code execution (RCE) vulnerability that was identified in WSUS reporting web services. For more information about the security fix, see CVE-2025-59287.
As part of this OOB release, we have updated the Windows Server Base OS container images. With these updates, you can either automate the build process for updated container images or manually pull the latest versions. Unlike Windows Server or Windows client, Windows Server containers do not include a servicing stack and do not support in-place updates. Instead, we rebuild and publish updated Windows Server Base OS container images each month to incorporate the latest fixes.
For more information on update best practices, see Update Windows Server containers.
Known issues in this update
Windows Server Update Services (WSUS) does not display error details
After installing this update or later updates, Windows Server Update Services (WSUS) does not display synchronization error details within its error reporting. This functionality is temporarily removed to address the Remote Code Execution Vulnerability. For more information about the vulnerability, see CVE-2025-59287.
Available Windows Server container image
| Container |
Version |
KB |
Architecture |
Languages |
Windows Server 2025 Server Core Container
Windows Server Core |
10.0.26100.6905 |
Cumulative LCU: KB5070881
SSU version 10.0.26100.6893
(included in LCU) |
x64 |
en-us |
Windows Server 2025 Nano Server Container
Nano Server |
10.0.26100.6905 |
Cumulative LCU: KB5070881
SSU version 10.0.26100.6893
(included in LCU) |
x64 |
en-us |
Windows Server 2025 Container
Windows Server |
10.0.26100.6905 |
Cumulative LCU: KB5070881
SSU version 10.0.26100.6893
(included in LCU) |
x64 |
en-us |
End of support for Windows Server 2025
After October 10, 2034, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows Server 2025. We recommend that you upgrade to a later version of Windows Server.
| Container |
Version |
KB |
Architecture |
Languages |
Windows Server 2022 Server Core Container
Windows Server Core |
10.0.20348.4297 |
Cumulative LCU: KB5070884
SSU version 10.0.20348.4285
(included in LCU) |
x64 |
en-us |
Windows Server 2022 Nano Server Container
Nano Server |
10.0.20348.4297 |
Cumulative LCU: KB5070884
SSU version 10.0.20348.4285
(included in LCU) |
x64 |
en-us |
Windows Server 2022 Container
Windows Server |
10.0.20348.4297 |
Cumulative LCU: KB5070884
SSU version 10.0.20348.4285
(included in LCU) |
x64 |
en-us |
End of support for Windows Server 2022
End of support
After October 14, 2031, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows Server 2022. We recommend that you upgrade to a later version of Windows Server.
NOTE For all Windows Server 2019 images (Windows Server, Nano Server, and Windows Server Core), we now default to tag LTSC2019. However, you can continue to use the 1809 tag (as before) to pull the latest Nano Server and Windows image.
| Container |
Version |
KB |
Architecture |
Languages |
Windows Server 2019 Server Core Container
Windows Server Core |
10.0.17763.7922 |
Cumulative LCU: KB5070883
SSU version 10.0.17763.7912
(included in LCU) |
x64 |
en-us |
Windows Server 2019 Nano Server Container
Nano Server |
10.0.17763.7922 |
Cumulative LCU: KB5070883
SSU version 10.0.17763.7912
(included in LCU) |
x64 |
en-us |
Windows Server 2019 Windows Container
Windows |
10.0.17763.7922 |
Cumulative LCU: KB5070883
SSU version 10.0.17763.7912
(included in LCU) |
x64 |
en-us |
End of support for Windows Server 2019
End of support
Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes on the following end dates. We recommend that you upgrade to a later version of Windows Server.
| Container |
Version |
KB |
Architecture |
Languages |
Windows Server 2016 Server Core Container
Windows Server Core |
10.0.14393.8524 |
Cumulative LCU: KB5070882
SSU: KB5066584
.NET 4.7.2: KB4054590 |
x64 |
cs-cz, de-de, en-us, es-es, fr-fr, hu-hu, it-it, ja-jp, ko-kr, nl-nl, pl-pl, pt-br, pt-pt, ru-ru, sv-se, tr-tr, zh-cn, zh-tw |
End of support for Windows Server 2016
End of support
Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes on the following end dates. For information about the availability of Extended Security Updates (ESUs), see Plan for Windows Server 2016 and Windows 10 2016 LTSB end of support.
References
Windows and containers
Update Windows Server containers
For information on .NET Framework support, see dotnet/framework.
