CVE-2023-21538— .NET Denial of Service Vulnerability
Quick assessment
Affected
Microsoft .NET 6.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Microsoft .NET是美国微软（Microsoft）公司的一个致力于敏捷软件开发、快速应用开发、平台无关性和网络透明化的软件框架。 Microsoft .NET存在安全漏洞。攻击者利用该漏洞导致系统拒绝服务。
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I. Basic Information for CVE-2023-21538
Vulnerability Information
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Vulnerability Title
.NET Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
.NET Denial of Service Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft .NET 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft .NET是美国微软（Microsoft）公司的一个致力于敏捷软件开发、快速应用开发、平台无关性和网络透明化的软件框架。 Microsoft .NET存在安全漏洞。攻击者利用该漏洞导致系统拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | .NET 6.0 | 6.0.0 ~ 6.0.13 | - |
|
| Microsoft | PowerShell 7.2 | 7.2.0 ~ 7.2.9 | - |
|
II. Public POCs for CVE-2023-21538
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · Microsoft · 2023-01-10 · 98 CVEs total
| CVE-2023-21732 | 8.8 HIGH | Microsoft ODBC Driver Remote Code Execution Vulnerability |
| CVE-2023-21744 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2023-21549 | 8.8 HIGH | Windows SMB Witness Service Elevation of Privilege Vulnerability |
| CVE-2023-21742 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2023-21674 | 8.8 HIGH | Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability |
| CVE-2023-21676 | 8.8 HIGH | Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability |
| CVE-2023-21681 | 8.8 HIGH | Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability |
| CVE-2023-21679 | 8.1 HIGH | Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability |
| CVE-2023-21555 | 8.1 HIGH | Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability |
| CVE-2023-21556 | 8.1 HIGH | Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability |
| CVE-2023-21548 | 8.1 HIGH | Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability |
| CVE-2023-21546 | 8.1 HIGH | Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability |
| CVE-2023-21543 | 8.1 HIGH | Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability |
| CVE-2023-21535 | 8.1 HIGH | Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability |
| CVE-2023-21745 | 8.0 HIGH | Microsoft Exchange Server Spoofing Vulnerability |
| CVE-2023-21762 | 8.0 HIGH | Microsoft Exchange Server Spoofing Vulnerability |
| CVE-2023-21793 | 7.8 HIGH | 3D Builder Remote Code Execution Vulnerability |
| CVE-2023-21735 | 7.8 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2023-21734 | 7.8 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2023-21737 | 7.8 HIGH | Microsoft Office Visio Remote Code Execution Vulnerability |
Showing top 20 of 98 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: .NET 6.0
-
CVE-2025-36855
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CVE-2024-43484
.NET, .NET Framework, and Visual Studio Denial of Service Vu
Same vendor: Microsoft
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Same weakness: CWE-502
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WordPress Strong Testimonials plugin <= 3.3.12 - PHP Object -
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LearnPress <= 4.4.10 - Unauthenticated PHP Object Injection -
CVE-2026-104734
Kirki <= 6.3.2 - Authenticated (Administrator+) PHP Object I
V. Comments for CVE-2023-21538
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