Windows Server · 2022 · Release · Out-of-band update
January 17, 2026—KB5077800 (OS Build 20348.4650) Out-of-band
- Release
- Cumulative update
- KB5077800 — Microsoft's article, opens in a new tab
Windows Server 2022: Supported LTSC release
Microsoft's known issues — KB5077800
- Issue Known issue After installing KB5070884 or later updates, Windows Server Update Services (WSUS) does not display synchronization error details within its error reporting. This functionality is temporarily removed to address the Remote Code Execution Vulnerability, CVE-2025-59287 . After installing this update, some applications may become unresponsive or encounter 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 Workaround: This issue is addressed in KB5078136 . This issue is addressed in KB5075906 .
Known issues — reported on the forum
In the news
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- Fix Microsoft Kerberos OOB Updates Fix Domain Controller Sign in Failures (2022)
- Fix KB5037422 Out of Band Fix Restores LSASS Stability on Windows Server 2022
- Coverage Windows Server 2022 File Sharing Guide: GUI Setup and Automation
- Fix Patch Binutils addr2line CVE-2022-47673: Fix Out-of-Bounds Read Now
- Fix etcd CVE-2022-34038: Patch fixes PageWriter panic in v3.5.5
Discussed on the forum
No member thread names 20348.4650 yet.