KB5078133: Overview with user sentiment and feedback

Overview

This out-of-band update for Windows Server 23H2 (KB5078133) is cumulative. It includes updates from previous security, along with an additional fix. The update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

General Purpose

This out-of-band (OOB) update includes the following improvements:[File System] Fixed: After installing the Windows update released on and after January 13, 2026, some applications became unresponsive or encountered unexpected errors when opening files from or saving files to cloud-based storage, such as OneDrive or Dropbox. In certain Outlook configurations that store PST files on OneDrive, Outlook may hang and fail to reopen unless the process is terminated or the system is restarted. Users may also see missing sent Items or previously downloaded emails being re-downloaded.

General Sentiment

The general sentiment towards this update is mixed. While it addresses some important file system issues that were causing problems for users, the fact that there are known issues with this update means that there is still some risk involved with installing it. Users may want to carefully evaluate the impact of the known issues on their specific environment before deploying this update.

Known Issues

• Windows Server Update Services (WSUS) does not display synchronization error details within its error reporting after installing KB5070879 or later updates. This functionality has been temporarily removed to address a Remote Code Execution Vulnerability, CVE-2025-59287.

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 2026-02-28 01:14 AM

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