KB5066726: Overview with user sentiment and feedback
Last Updated November 30, 2025
Probability of successful installation and continued operation of the machine
Overview
The October 14, 2025 update for Windows Server 2008 R2 SP1 and Windows Server 2008 SP2 includes security improvements in .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2. This update addresses a security vulnerability detailed in CVE-2025-55248, which is an information disclosure vulnerability in the .NET Framework. Starting in July 2020, there will no longer be optional, non-security releases (known as "C" releases) for this operating system. Operating systems in extended support have only cumulative monthly security updates (known as the "B" or Update Tuesday release).
General Purpose
This security update addresses an information disclosure vulnerability detailed in CVE-2025-55248 in the .NET Framework 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows Server 2008 R2 SP1 and Windows Server 2008 SP2. It is a cumulative monthly security update that includes only security improvements and no new features. Customers who have purchased the Extended Security Update (ESU) for on-premises versions of these operating systems must follow the procedures in KB4522133 to continue receiving security updates after extended support ends on January 14, 2020.
General Sentiment
The general sentiment towards this update is positive, as it addresses a known security vulnerability without introducing any new issues. However, it's important to note that the operating systems receiving this update, Windows Server 2008 R2 SP1 and Windows Server 2008 SP2, are in extended support and will no longer receive non-security updates. This means that users should carefully evaluate the impact of this update on their systems and ensure that any necessary compatibility testing is performed before deployment. Additionally, customers who have purchased the Extended Security Update (ESU) for these operating systems will need to follow the procedures in KB4522133 to continue receiving security updates after extended support ends.
Known Issues
Microsoft is not currently aware of any known issues with this update.
Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2025-11-30 07:09 PM
