KB5051974 is cumulative update for Windows 10 21H2 edition released under ‘February Patch Tuesday’ on 11 February 2025.
Update History
KB5051974 superseded KB5049981 cumulative update for Windows 10. It also includes all changes that are part of the preview update KB5050081 released on 28 January 2025.
- KB5051974 is build 19044.5487 for Windows 10 21H2
- KB5051974 is build 19045.5487 for Windows 10 22H2
Servicing Stack Updates
KB5050111 is the Servicing Stack Update for Windows 10 for February 2025. This Servicing Stack Update is part of the main update KB5051974.
A Servicing Stack Update contains files that help is streamlining the Windows Update process.
- Servicing Stack Update KB5050111 for Windows 10 21H2 corresponds to build 19044.5425.
- Servicing Stack Update KB5050111 for Windows 10 22H2 corresponds to build 19045.5425.
These build numbers are specific to the Servicing Stack build information only. The main build for Windows 10 have already been mentioned above.
Security
KB5051974 addresses 29 security vulnerabilities in Windows 10 version 21H2 and 22H2 for x64 deployments.
A CRITICAL vulnerability CVE-2025-21376 with CVSS 8.1 is also addressed for Windows 10 in KB5051974.
Installation
Installing KB5051974 is direct through the Windows Update program. No action is needed to install the Servicing Stack Update.
As a system administrator, Windows 10 updates can be authorized through the WSUS program as well. No action is needed to install the Servicing Stack Update as it will be automatically installed during the process.
The manual installation is a single step installation through the Windows Catalog. Appropriate files for the 21H2 and 22H2 can be downloaded for different environments (x64, x86, ARM64) from the following page:
Unresolved issues
KB5051974 lists 3 unresolved issues that include:
Following the installation of the October 2024 security update, some customers report that the OpenSSH (Open Secure Shell) service fails to start, preventing SSH connections. The workaround involves updating the ACLs on the affected directories. You can refer the detailed instructions in Microsoft release notes.
Devices that have certain Citrix components installed might be unable to complete installation of the January 2025 Windows security update. This issue was observed on devices with Citrix Session Recording Agent (SRA) version 2411. The 2411 version of this application was released in December 2024. The workaround instructions are published on Citrix website.
The Windows Event Viewer might display an error related to SgrmBroker.exe, on devices that have installed Windows updates released January 14, 2025 or later. The workaround involved disabling the service as per workaround instructions.