September 12, 2023-KB5031086 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2

2023-11-0600:00:00

Microsoft

support.microsoft.com

cumulative update

.net framework

security improvements

cve-2023-36796

cve-2023-36792

cve-2023-36793

cve-2023-36794

cve-2023-36788

windows 11

version 23h2

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

AI Score

8.2

Confidence

High

EPSS

0.001

Percentile

45.0%

JSON

September 12, 2023-KB5031086 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 23H2

Release Date:
September 12, 2023 Version: ** .NET Framework 3.5 and 4.8.1**

Summary

This article describes the security and Cumulative Update for 3.5 and 4.8.1 for Windows 11, version 23H2. Security Improvements CVE-2023-36796 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE 2023-36796. CVE-2023-36792 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE-2023-36792. CVE-2023-36793 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE-2023-36793. CVE-2023-36794 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE-2023-36794. CVE-2023-36788 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in the WPF XAML parser where an unsandboxed parser can lead to remote code execution. For more information see CVE 2023-36788.Quality and Reliability ImprovementsThere are no new Quality and Reliability Improvements in this update.

Known issues in this update

Microsoft is not currently aware of any issues in this update.

Additional information about this update

The following articles contain additional information about this update as it relates to individual product versions.

5029921 Description of the Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2 and Windows 11, version 23H2 (KB5029921)

How to get this update

Release Channel	Available	Next Step
Windows Update and Microsoft Update	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Windows Update for Business	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Microsoft Update Catalog	Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)	Yes	This operating system update will offer, as applicable, and individual .NET Framework product updates will be installed. For more information about individual .NET Framework product updates see additional information about this update section. This update will automatically sync with WSUS if you configure as follows: Product: Windows 11, version 23H2Classification: Security Updates