KB5068791 is the cumulative update for Windows Server 2019 and Windows Server 2019 Server Core installation. It was released on 11 November, 2025 under the ‘Patch Tuesday’ release cycle.
Salient points
- KB5068791 supersedes October 2025 cumulative update KB5066586.
- KB5068791 corresponds to Windows server build 17763.8027.
- One Zero-day vulnerability affects Windows Server 2019 and Windows Server 2019 Server Core installation as per November’s security bulletin.
- 63 security vulnerabilities have been disclosed for October 2025 by Microsoft. 32 of these affect Windows Server 2019 and Windows Server 2019 Server Core installation.
- 2 of these vulnerabilities are Critical vulnerabilities. Details of critical security vulberabilities are shared in the vulnerabilities section below.
- The Servicing Stack Update corresponding to KB5068791 is KB5070248 (17763.8020). It is in-built in the main cumulative update. Separate installation of the SSU or Servicing Stack is not needed.
- KB5005112 is the SSU that must be already deployed on Windows Server 2019. If you have not deployed this SSU, please download KB5005112 and apply on the server. This is a very old SSU released in August 2021. If you have followed the update release cycle, there is a high chance that you already have this patch on the server. SSU installation does not cause server reboot.
Important Reminders
Apart from this, it is important to note that the Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Secure Boot is a security feature in Unified Extensible Firmware Interface (UEFI) based firmware that helps ensure that only trusted software runs during a device’s boot (start) sequence.
Since Windows introduced Secure Boot support, all Windows-based devices have carried the same set of Microsoft certificates in the KEK and DB. These original certificates are nearing their expiration date, and your device is affected if it has any of the listed certificate versions. To continue running Windows and receiving regular updates for your Secure Boot configuration, you will need to update these certificates.
Download KB5070248
KB5070248 is the Servicing Stack Update for Windows Server 2019 released in November 2025 alongside the main cumulative update KB5068791.
If you intend to deploy cumulative updates through Windows Update or Windows Update for Business, no action is needed to install the Servicing Stack Update. The Servicing Stack Update is part of the security update that will be installed on Windows Server 2019.
For manual installation of KB5068791, there is no separate installation of KB5070248 as it is included in the main cumulative security update.
Download KB5068791
You may download the offline installer file for KB5068791 from the catalog site link shared below:
Upon installation of KB5068791, the server would restart. The Servicing Stack Update is already included in the main update and will be downloaded and installed as part of the installation process.
Zero-day vulnerabilities
One zero-day vulnerability has been reported for Windows Server 2019 in November 2025.
- CVE-2025-62215
- CVSS 3.1 – 7.1
- This vulnerability is confirmed zero-day vulnerability as it has been exploited and exploitation has been confirmed.
- The security vulnerability affects Windows Kernel.
- It could lead to Elevation of Privileges
Critical vulnerabilities
The October security bulletin for Windows Server 2019 reports 32 security vulnerabilities. The 2 CRITICAL vulnerabilities affecting Windows Server 2019 are shared below.
| CVE-2025-60724 | 9.8 | Remote Code Execution in GDI+. |
| CVE-2025-60716 | 7 | Elevation of Privilege vulnerability in DirectX Graphics Kernel. |
It is important to note that there is a CVSS 9.8 security vulnerability so, system administrators must patch KB5068791 immediately to protect against the security vulnerabilities.
Changelog – KB5068791
The following changes or improvements are part of KB5068791 for Windows Server 2019:
- The update addresses security improvements for Windows Server 2019 and Windows Server 2019 Server Core installation.
- [Internal Windows OS] This update contains miscellaneous security improvements to internal Windows OS functionality. No specific issues are documented for this release.
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