KB5131080: Overview with user sentiment and feedback
Last Updated November 11, 2026
Probability of successful installation and continued operation of the machine
Overview
KB5131080 is the November 10, 2026 cumulative security update for Windows Server 2025 (OS Build 26100.33822). It rolls in the October 2026 fixes from KB5126646 and out-of-band KB5134137. It requires servicing stack update KB5131079 (26100.33822 or later) and checkpoint update KB5043080 when installed standalone. Scope in the provided data is Windows Server 2025 only.
General Purpose
- Improves NTLM security by enabling message signing by default for non-anonymous connections, with auditing for unsigned connections.
- Stricter PowerShell signed-script validation: scripts with invalid UTF-8 may now fail signature checks and need re-encoding and re-signing.
- Fixes printer install failures (error 87) for Active Directory-published printers, introduced in the October 2026 update.
- Fixes RD Web Access failing when XSLT is disabled in Edge or Chrome, now rendering server-side.
- Fixes in-place upgrade compatibility-check failures from Windows Server 2016 to 2025, plus Exchange on-prem OWA/mail issues.
- Import-WdsInstallImage now requires administrator rights; Cuba DST rules updated; Secure Boot certificate transition remains in progress.
General Sentiment
No Reddit or windowslatest discussion was included in the provided data, so community reception could not be assessed directly. The fixes it lists address problems from recent updates, which is a positive sign. The main concerns are the stricter PowerShell signature validation, which may break existing signed scripts, and the Exchange issue Microsoft documents on its own page.
Known Issues
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 2026-11-11 06:59 AM
