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Known update issues

KB5127690 – known issues and fixes

KB5127690 is a Microsoft update from Patch Tuesday October 2026, released on 13 Oct 2026. According to the Security Update Guide it fixes 9 vulnerabilities (Developer tools (.NET, Visual Studio …)). Affected according to our entries: Microsoft Windows Server 2024. Known issues with this update: 1 open.

1Open
0Workaround
0Fixed
9Vulnerabilities fixed

← All known issues

Known issues with KB5127690

OpenKnown issueCommunity reportCheck script

Windows Server 2025 24H2: .NET cumulative update fails with 0x80070bc9 (unconfirmed)

A single user report describes the .NET cumulative update KB5127690 failing with error 0x80070bc9 on Windows Server 24H2 (build 26100.33650, Hyper-V VM). This is reported by users, not yet confirmed by the vendor. Microsoft has published no release-health entry for it; the error looks like a machine-specific servicing fault, not an update defect.

Microsoft · Windows Server 2024

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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