Table of Contents
- Are You Making This Dangerous Mistake? What Every Business Must Know About Windows Server Updates
- Why These Updates Matter for Your Security
- What are Cumulative Updates and Servicing Stacks?
- November 2025 Updates for Windows Server
- Windows Server 2025
- Windows Server 2022 & 23H2
- Windows Server 2016 & 2019
- Windows Server 2012 & R2
Are You Making This Dangerous Mistake? What Every Business Must Know About Windows Server Updates
On the second Tuesday of every month, Microsoft releases a set of updates to fix problems and improve its software. This regular event is known as “Patch Tuesday.”. These updates are important for keeping your Windows Server running smoothly and safely. This guide will walk you through the updates released on November 11, 2025, for different versions of Windows Server.
Why These Updates Matter for Your Security
Think of these updates as fixing locks on your doors. Hackers are always trying to find ways to break in, and these patches block them. Regularly updating your server is one of the best ways to protect your business’s important information. These updates also help your server run faster and more efficiently. They are like a tune-up for your car, making sure everything works as it should.
What are Cumulative Updates and Servicing Stacks?
Microsoft bundles many fixes into a single “cumulative update.”. This means you get all the past fixes plus the new ones in one package, which saves time [, web.12]. You don’t have to install a long list of updates one by one.
A “servicing stack update” (SSU) is a special kind of update that improves the Windows Update tool itself. It’s like upgrading the tools your mechanic uses to fix your car. You need to install the SSU so that the main cumulative update can be installed correctly.
November 2025 Updates for Windows Server
Here is a summary of the important updates released on November 11, 2025, which address 63 vulnerabilities, including one that was actively exploited:
Windows Server 2025
Received cumulative update KB5068861. This includes security fixes and other improvements. It will install automatically or can be downloaded from the Microsoft Update Catalog.
Windows Server 2022 & 23H2
- Windows Server 23H2 got cumulative update KB5068779.
- Windows Server 2022 was updated with KB506878.
- Both updates include security patches and will be installed automatically or can be found in the Microsoft Update Catalog.
Windows Server 2016 & 2019
- Windows Server 2019 received cumulative update KB5068791.
- Windows Server 2016 was updated with KB5068864.
- These updates also patch security holes and fix bugs. You should check the installation instructions, as you may need to install a servicing stack update first.
Windows Server 2012 & R2
- These older versions are no longer supported without a special “Extended Security Updates” (ESU) license.
- Windows Server 2012 R2 received update KB506890.
- Windows Server 2012 got update KB5068907.
- To install these, you must have an ESU license. The updates are available through the Microsoft Update Catalog.