KB5066780: Overview with user sentiment and feedback

Overview

This security update for Windows Server, version 23H2 contains fixes and quality improvements from the previous update KB5065425 released in September 2025. The update addresses several issues, including problems with the Chinese Input Method Editor (IME), networking connectivity using SMB v1, PowerShell Remoting, and device stability. It also includes security hardening improvements for smart card authentication and disables the file preview feature in File Explorer for downloaded internet files to enhance security.

General Purpose

The key improvements and fixes included in this October 2025 security update for Windows Server, version 23H2 are:- Addressed an issue where some characters didn't display correctly when using the Chinese Input Method Editor (IME).- Fixed an issue where certain Chinese characters appeared as empty boxes in some text fields when a character limit was set.- Resolved a problem where users might not be able to connect to shared files and folders if using the SMB v1 protocol on NetBIOS over TCP/IP after installing the previous update KB5065425.- Addressed an issue affecting PowerShell Remoting and Windows Remote Management (WinRM) where commands might time out after 10 minutes.- Fixed a stability issue observed in rare cases after installing the May 2025 security update, which caused some devices to become unresponsive.- Removed the ltmdm64.sys driver, which means fax modem hardware dependent on this driver will no longer work in Windows.- Enforced a security hardening improvement by requiring the use of Key Storage Provider (KSP) instead of Cryptographic Service Provider (CSP) for RSA-based smart card certificates.- Automatically disabled the file preview feature in File Explorer for files downloaded from the internet to enhance security and prevent vulnerabilities.

General Sentiment

The overall sentiment towards this October 2025 security update for Windows Server, version 23H2 appears to be positive. The update addresses several important issues, including problems with the Chinese IME, networking connectivity, PowerShell Remoting, device stability, and security vulnerabilities. The removal of the ltmdm64.sys driver and the requirement to use KSP instead of CSP for smart card certificates may cause compatibility issues for some users, but Microsoft has provided guidance on how to address these changes.The automatic disabling of the file preview feature in File Explorer is a security-focused change that will help prevent potential vulnerabilities when users preview downloaded internet files. While this may impact some workflows, the improved security is likely worth the trade-off for most organizations.Overall, the update seems to provide valuable fixes and improvements that should enhance the stability, security, and usability of Windows Server, version 23H2. As long as users are aware of the potential compatibility issues and follow the provided guidance, this update should be a welcome addition to the Windows Server ecosystem.

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 01:29 AM

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