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.NET Framework 3.5 / 4.8.1 .NET Framework 3.5 / 4.8.1 Update
Patch Tuesday

KB5062061

KB5062061: Cumulative update for .NET Framework, versions 3.5 and 4.8.1, on Windows Server 2022, July 2025. TypeDescriptor concurrency and .NET error dialogs addressed

In short

Addresses a .NET TypeDescriptor concurrency issue and error-reporting dialogs triggered by interactions with Windows code integrity enforcement. It includes no new security improvements.

Does it affect you? Applies to: Devices running Windows Server 2022 with .NET Framework 3.5 or 4.8.1 installed.

File version
2.0.50727.9179 · 4.8.9315.0
Restart
Required

What changes

Improvements 2 changes

.NET Libraries

For: .NET applications

  • Addresses a concurrency issue involving .NET property and type-converter lookup.1
    The issue involves TypeDescriptor.GetProperties() and TypeDescriptor.GetConverter().

.NET Runtime

  • Addresses error-reporting dialog boxes triggered by interactions between .NET Framework DLL loads and Windows code integrity enforcement.2

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2025-07-08
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5054693
Replaced by
KB5065753
VersionFile versionChannel
3.5 2.0.50727.9179 General availability
4.8.1 4.8.9315.0 General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

x64 Windows Server 2022
72.4 MB
windows10.0-kb5062061-x64-ndp481.msu Main update · KB5062061 SHA-1: e65eb8b4…817993

Updated components

27 files changed since the previous update for the same versions.

Top changed componentsFiles
.NET runtime (CLR)12

Sources

Updated
Cited passages from Microsoft's official notes (2)
  1. 1. Addresses an issue with concurrency in TypeDescriptor.GetConverter()issue in TypeDescriptor GetProperties() and GetConverter(). support.microsoft.com
  2. 2. Addresses an issue where interactions between .NET Framework DLL loads and OS code integrity enforcement policy trigger error reporting dialog boxes. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 2 quoted passages · compared with Microsoft's page on Oct 20, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 5/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake