Final Windows Security Updates for 2025 Now Available

As we reach December 2025, Microsoft has unveiled the year’s final security updates for its Windows operating system. These updates cater to all supported Windows versions, including Windows 10, which is currently receiving only limited, extended support releases.

This weekly summary delivers essential information for both home users and system administrators. While the details are largely contingent on Microsoft’s actions, this overview includes a summary of the updates issued, the severity of identified security vulnerabilities, links to support pages, access to downloads, and a list of confirmed issues as reported by Microsoft.

It’s important to note that Microsoft previously announced that updates for the Home and Pro editions of Windows 11, version 23H2, will no longer be available. Users are encouraged to upgrade to a newer version of Windows 11 to continue receiving updates.

December 2025 Microsoft Windows Security Updates

For a comprehensive list of the updates released, you can download the following Excel spreadsheet: Windows security updates December 2025.

Executive Summary

A total of 57 security updates were issued for various Microsoft products, along with 13 updates addressing non-Microsoft issues, such as those related to Chromium.
Microsoft has reported no critical vulnerabilities affecting Windows client and server systems.
Windows Clients with Issues:
- Windows 10: None
- Windows 11: Versions 24H2 and 25H2
Windows Server Clients with Issues:
- Windows Server 2008, 23H2, 2022, 2025

Product Overview

Below is a summary of each supported version of Windows and their associated critical vulnerabilities:

Windows 10 version 22H2: 31 vulnerabilities (0 critical, 31 important).
Windows 11 version 24H2: 36 vulnerabilities (0 critical, 36 important).
Windows 11 version 25H2: 36 vulnerabilities (0 critical, 36 important).

Windows Server Products

Windows Server 2008 R2 (Extended Support Only): 11 vulnerabilities (0 critical, 11 important).
Windows Server 2016: 18 vulnerabilities (0 critical, 18 important).
Windows Server 2019: 29 vulnerabilities (0 critical, 29 important).
Windows Server 2022: 32 vulnerabilities (0 critical, 32 important).
Windows Server 2025: 36 vulnerabilities (0 critical, 36 important).

Windows Security Updates

Windows 10 version 22H2

Support Page: KB5071546

Updates and Improvements:

[Powershell] The Invoke-WebRequest command now requires user confirmation before proceeding with script execution, enhancing security against unauthorized script runs.
Various security updates.

Windows 11 versions 24H2 and 25H2

Support Page: KB5072033

Updates and Improvements:

Fixed an issue where Ask Copilot failed to activate the Click to Do window as intended.
Resolved a glitch causing File Explorer to momentarily flash white during page navigation.
Addressed a problem with external virtual switches losing their physical network adapter (NIC) bindings after a reboot.
[Powershell] The Invoke-WebRequest command now requires user confirmation, adding a layer of protection against unauthorized script execution.
Various security improvements.

Known Issues for Windows 11 versions 24H2 and 25H2

Missing Password Buttons: Some users may experience missing or invisible password buttons in the lock screen sign-in options.
- Workaround: This issue can be mitigated using Known Issues Rollback; users can hover over the invisible button to activate it.

Security Advisories and Updates

ADV 990001 — Latest Servicing Stack Updates

How to Download and Install the December 2025 Security Updates

Microsoft typically distributes security updates automatically to consumer devices and unmanaged systems by default. However, it may take time for these updates to appear. Here’s how to expedite the process:

Open the Start menu, type Windows Update, and select the resulting option.
Click on the Check for updates button to initiate a manual search for updates.
If the updates do not download automatically, click on the Download & Install All button.

For safety, it is advisable to create a system backup before proceeding with any updates.

Direct Update Downloads

If you prefer manual installation, here are the resource pages with direct download links:

KB5071546 — 2025-12 Cumulative Update for Windows 10 Version 22H2
KB5072033 — 2025-12 Cumulative Update for Windows 11 Versions 24H2 and 25H2

Additional Resources

December 2025 Security Updates Release Notes List of Software Updates for Microsoft Products Security Updates Guide Microsoft Update Catalog Comprehensive guide on Windows updates Instructions for installing optional updates on Windows 10 Windows 11 25H2 Update History Windows 11 24H2 Update History Windows 10 Update History

Source & Images