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KB5122385

.NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 and Microsoft server operating system 24H2

Support article Update Catalog CVEs in Security CVE list for a ticket

.NET Framework servicing update

Microsoft Support

Framework servicing is separate from the Windows OS update. Microsoft's article provides applicability and security fixes; test the framework versions installed on your servers.

Applies to

Windows 11, version 24H2Windows 11, version 25H2

Source: Microsoft Support · 27 Aug 2026

Companion updates for this Windows version

Same patch cycle

Windows and .NET Framework are serviced separately. These packages target the same Windows version; choose the framework packages that apply to your installation.

11 Aug 2026

Companion updates do not replace this KB or establish an installation prerequisite.

MSRC lists no CVEs under this KB in the collected releases.

What changed

First observed 19 Oct 2026

No field changes in the recorded history.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 20 Oct 22:55 UTC · 258 of 260 readable · 256 fully read · documentation 416/439 current

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