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.NET Framework 3.5 / 4.8.1 .NET Framework 3.5 / 4.8.1 Optional preview
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KB5092430

KB5092430: Cumulative update for .NET Framework, versions 3.5 and 4.8.1, on Windows 11 24H2, May 2026. Hanging secure requests and debugger values addressed

In short

Addresses cases where secure HTTP requests could hang and floating-point values could be reported incorrectly in Visual Studio’s x86 native debugger.

Does it affect you? Applies to: Devices running Windows 11, version 24H2, with .NET Framework 3.5 or 4.8.1 installed.

File version
2.0.50727.9181 · 4.8.9336.0
Restart
Required

What changes

Fixes 2 changes

.NET Libraries

For: Devices making synchronous secure HTTP requests

  • Some requests over secure connections could hang with certain server setups; this update addresses the issue.1
    Addresses an issue with synchronous HttpWebRequest connections where requests could hang in specific secure connection scenarios with certain server configurations.

.NET Runtime

For: Visual Studio x86 native debugger users

  • Floating-point values could be reported incorrectly while stepping through code in Visual Studio’s x86 native debugger; this update addresses the issue.2
    Addresses an issue in the Visual Studio x86 native debugger where certain floating-point values could be reported incorrectly during step operations in mixed-code applications.

Technical details

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

Data sheet

Released
2026-05-26
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5074831, KB5064401, KB5056579, KB5054979
+3 earlier KB5050577, KB5048162, KB5045934
Replaced by
KB5101001
VersionFile versionChannel
3.5 2.0.50727.9181 General availability
4.8.1 4.8.9336.0 General availability

Security

No vulnerabilities are listed for this update.

Updated components

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

Top changed componentsFiles
.NET runtime (CLR)12
.NET networking6

Sources

Updated
Cited passages from Microsoft's official notes (2)
  1. 1. Addresses an issue with synchronous HttpWebRequest connections where requests could hang in specific secure connection scenarios with certain server configurations. support.microsoft.com
  2. 2. Addresses an issue in the Visual Studio x86 native debugger where certain floating-point values could be reported incorrectly during step operations in mixed-code applications. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 2 quoted passages · compared with Microsoft's page on Sep 25, 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 4/5, clarity 4/5, 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