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

KB5033910

KB5033910: Cumulative update for .NET Framework, version 4.8, on Windows 10 1607 and Windows Server 2016, January 2024. Security flaws could bypass protections or let attackers run code

In short

Addresses four Important vulnerabilities in .NET Framework 4.8, including flaws that could bypass protections, disrupt service, or let an attacker run code remotely.

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

File version
4.8.4690.0
Security
4 fixed
Restart
Required

What changes

Fixes 4 changes

.NET Framework 4.8

4 items
  • A flaw could let an attacker get around a security protection.1
    Addresses the .NET Framework security feature bypass vulnerability CVE-2024-0056.
  • A flaw could let an attacker gain higher permissions.2
    Addresses the elevation of privilege vulnerability CVE-2024-0057.
  • A flaw could let an attacker disrupt a service.3
    Addresses the .NET Framework denial of service vulnerability CVE-2024-21312.
  • A flaw could let an attacker run code on a system remotely.4
    Addresses a remote code execution vulnerability in the HTTP .NET remoting server channel chain.

Technical details

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

Data sheet

Released
2024-01-09
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaced by
KB5036609
VersionFile versionChannel
4.8 4.8.4690.0 General availability

Security

4 vulnerabilities fixed
4 important
VulnerabilitySeverityCVSS
CVE-2024-0057
NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability
 Important 9.1
CVE-2024-0056
Microsoft.Data.SqlClient and System.Data.SqlClient SQL Data Provider Security Feature Bypass Vulnerability
 Important 8.7
CVE-2024-21312
.NET Framework Denial of Service Vulnerability
 Important 7.5
CVE-2024-29059
.NET Framework Information Disclosure Vulnerability
 Important 7.5

Downloads (Microsoft Update Catalog)

x64 Windows 10 Enterprise LTSB 2016 / Windows Server 2016
54.4 MB
windows10.0-kb5033910-x64-ndp48.msu Main update · KB5033910 SHA-1: b1a3e722…9b6904
x86 Windows 10 Enterprise LTSB 2016
32.4 MB
windows10.0-kb5033910-x86-ndp48.msu Main update · KB5033910 SHA-1: bdbda668…995110

Sources

Updated
Cited passages from Microsoft's official notes (4)
  1. 1. This security update addresses a security feature bypass vulnerability detailed in CVE-2024-0056. support.microsoft.com
  2. 2. This security update addresses a elevation of privilege vulnerability detailed in CVE-2024-0057. support.microsoft.com
  3. 3. This security update addresses a denial of service vulnerability detailed in CVE-2024-21312. support.microsoft.com
  4. 4. This security update addresses a remote code execution vulnerability to HTTP .NET remoting server channel chain. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 4 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