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Known update issues

KB5127936 – known issues and fixes

There is no data from the Microsoft Security Update Guide for KB5127936 – for example for an optional preview update or an update from another vendor. Affected according to our entries: Microsoft Windows 11, Microsoft Windows 11, Version 26H2. Known issues with this update: 2 fixed.

0Open
0Workaround
2Fixed

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Known issues with KB5127936

FixedKnown issueCommunity report

Windows 11: Always On VPN failures from September updates fixed in KB5127936

Always On VPN profiles with automatic protocol selection or fallback (IKEv2 and SSTP) failed after the September 2026 Windows 11 updates. According to secondary sources and research notes, the optional preview update KB5127936 (28 Oct 2026) fixes this. We could not read the vendor page ourselves, so the details are not yet confirmed by a vendor source here.

Microsoft · Windows 11

FixedKnown issue

Windows 11 26H2: Remote Desktop fails for non-admin users (0xC000000D)

After the September 2026 preview update, non-admin users might be unable to connect via Remote Desktop to devices that have Administrator protection enabled. Microsoft resolved the issue with updates released on 2026-10-28. For Windows 11 24H2 the release health page still shows the issue as mitigated, with a fix planned for a future update.

Microsoft · Windows 11, Version 26H2

Where the information comes from

We continuously read the vendors’ official sources, community reports and trade media and summarise them in our own words, with a link to the source:

  • Microsoft: Windows release health (Windows 10/11, Server 2016 to 2025), Windows message center, known issues of Microsoft 365 Apps (Outlook, Excel, Word, PowerPoint), Edge, Intune, Autopilot, Windows 365 and Entra Connect, Microsoft KB articles with timelines, Exchange and Windows IT Pro blogs, optionally Microsoft 365 service health and message center
  • other vendors: Veeam KB, Citrix (known issues), Ubuntu and Debian (regressions), Broadcom (VMware), Fortinet, Cisco, Mozilla, Let’s Encrypt
  • community (title, short excerpt and link only, without the names of the authors): Microsoft Q&A, Microsoft Tech Community (discussions), Veeam R&D Forums, Eleven Forum
  • targeted web research with AI (Claude), e.g. on the updates of the month – this also finds discussions on Reddit and in forums; such entries are labelled as community reports until the vendor confirms them
  • early warning from trade media (title and link only): Born’s Tech and Windows World, BleepingComputer, AskWoody, Windows Latest, Windows Central, gHacks, The Windows Club, Deskmodder, Dr. Windows, WindowsArea, Frankys Web, heise online

Summary and translation with AI (Claude by Anthropic) – without any data of visitors.

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