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.NET Framework 4.8 .NET Framework 4.8 Security update
Patch Tuesday

KB5044021

KB5044021: Cumulative update for .NET Framework, version 4.8, on Windows 10 1607 and Windows Server 2016, October 2024. Two denial-of-service flaws patched; SQL CLR exceptions addressed

In short

Addresses two Important .NET Framework denial-of-service vulnerabilities and runtime exceptions in certain SQL CLR-hosted scenarios.

Does it affect you? Applies to: Devices running Windows 10, version 1607, or Windows Server 2016 with .NET Framework 4.8 installed.

File version
4.8.4762.0
Security
2 fixed
Restart
Required

What changes

Fixes 3 changes

.NET Framework

2 items

For: Devices with .NET Framework 4.8

  • A denial-of-service vulnerability in .NET Framework is addressed.1
    Addresses CVE-2024-43483.
  • A denial-of-service vulnerability in .NET Framework is addressed.2
    Addresses CVE-2024-43484.

.NET Libraries

  • Addresses runtime exceptions in certain scenarios where SQL CLR is hosted.3
    The issue followed May cumulative updates and affected certain SQL CLR-hosted scenarios.

Technical details

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

Data sheet

Released
2024-10-08
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaces
KB5041951, KB5039885
Replaced by
KB5049614
VersionFile versionChannel
4.8 4.8.4762.0 General availability

Security

2 vulnerabilities fixed
2 important
VulnerabilitySeverityCVSS
CVE-2024-43483
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
 Important 7.5
CVE-2024-43484
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
 Important 7.5

Downloads (Microsoft Update Catalog)

x64 Windows 10 Enterprise LTSB 2016 / Windows Server 2016
59.3 MB
windows10.0-kb5044021-x64-ndp48.msu Main update · KB5044021 SHA-1: 0e9b502a…563cbf
x86 Windows 10 Enterprise LTSB 2016
33.4 MB
windows10.0-kb5044021-x86-ndp48.msu Main update · KB5044021 SHA-1: 148ca60c…415c38

Updated components

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

Top changed componentsFiles
WPF22
.NET runtime (CLR)12
ASP.NET10

Sources

Updated
Cited passages from Microsoft's official notes (3)
  1. 1. CVE-2024-43483 - .NET Framework Denial of service vulnerability This security update addresses a denial-of-service vulnerability support.microsoft.com
  2. 2. CVE-2024-43484 - .NET Framework Denial of service vulnerability This security update addresses a denial-of-service vulnerability support.microsoft.com
  3. 3. Addresses an issue with May cumulative updates causing customers to observe runtime exceptions in certain SQL CLR hosted scenarios. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 3 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 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