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CVE-2026-45591— ASP.NET Core Denial of Service Vulnerability

Quick assessment

Affected
Microsoft .NET 10.0
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 ASP.NET Core是美国微软（Microsoft）公司的一框跨平台开源框架。该框架用于构建Web应用、物联网应用和移动后端等基于云的应用程序。 Microsoft ASP.NET Core存在资源管理错误漏洞。攻击者利用该漏洞导致系统拒绝服务。以下产品和版本受到影响：.NET 8.0 installed on Mac OS,.NET 9.0 installed on Mac OS,.NET 9.0 installed on Linux,.NET 9.0 installed on

CVSS 7.5 · High EPSS 2.44% · P84

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 7

VendorProduct Version RangeStatus
Microsoft .NET 10.0 10.0.0< 10.0.9 affected
Microsoft .NET 8.0 8.0.0< 8.0.28 affected
Microsoft .NET 9.0 9.0.0< 9.0.17 affected
Microsoft ASP.NET Core 10.0 10.0< 10.0.9 affected
Microsoft ASP.NET Core 8.0 8.0< 8.0.28 affected
Microsoft ASP.NET Core 9.0 9.0< 9.0.17 affected
Microsoft Microsoft Visual Studio 2026 version 18.6 18.6.0< 18.6.3 affected
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I. Basic Information for CVE-2026-45591

Vulnerability Information
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Vulnerability Title
ASP.NET Core Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
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
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft ASP.NET Core 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft ASP.NET Core是美国微软（Microsoft）公司的一框跨平台开源框架。该框架用于构建Web应用、物联网应用和移动后端等基于云的应用程序。 Microsoft ASP.NET Core存在资源管理错误漏洞。攻击者利用该漏洞导致系统拒绝服务。以下产品和版本受到影响：.NET 8.0 installed on Mac OS,.NET 9.0 installed on Mac OS,.NET 9.0 installed on Linux,.NET 9.0 installed on
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 10.0 10.0.0 ~ 10.0.9 -
Microsoft .NET 8.0 8.0.0 ~ 8.0.28 -
Microsoft .NET 9.0 9.0.0 ~ 9.0.17 -
Microsoft ASP.NET Core 10.0 10.0 ~ 10.0.9 -
Microsoft ASP.NET Core 8.0 8.0 ~ 8.0.28 -
Microsoft ASP.NET Core 9.0 9.0 ~ 9.0.17 -
Microsoft Microsoft Visual Studio 2026 version 18.6 18.6.0 ~ 18.6.3 -

II. Public POCs for CVE-2026-45591

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III. Intelligence Information for CVE-2026-45591

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Vendor Advisories for CVE-2026-45591 (1)

Same Patch Batch · Microsoft · 2026-06-09 · 200 CVEs total

CVE-2026-45657 9.8 CRITICAL Windows Kernel Remote Code Execution Vulnerability
CVE-2026-47643 9.8 CRITICAL Azure Stack Edge Remote Code Execution Vulnerability
CVE-2026-47291 9.8 CRITICAL HTTP.sys Remote Code Execution Vulnerability
CVE-2026-26142 9.8 CRITICAL Nuance PowerScribe Remote Code Execution Vulnerability
CVE-2026-44815 9.8 CRITICAL DHCP Client Service Remote Code Execution Vulnerability
CVE-2026-47281 9.6 CRITICAL Visual Studio Code Elevation of Privilege Vulnerability
CVE-2026-42904 9.6 CRITICAL Windows TCP/IP Elevation of Privilege Vulnerability
CVE-2026-45602 9.1 CRITICAL Windows Dynamic Host Configuration Protocol (DHCP) Tampering Vulnerability
CVE-2026-47653 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-45648 8.8 HIGH Windows Active Directory Domain Services Remote Code Execution Vulnerability
CVE-2026-45504 8.8 HIGH Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-47289 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-32193 8.8 HIGH Azure Kubernetes Service (AKS) Remote Code Execution Vulnerability
CVE-2026-45484 8.8 HIGH Microsoft SharePoint Elevation of Privilege Vulnerability
CVE-2026-42985 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-40371 8.8 HIGH Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability
CVE-2026-45463 8.4 HIGH Microsoft Office Remote Code Execution Vulnerability
CVE-2026-45641 8.4 HIGH Windows Hyper-V Remote Code Execution Vulnerability
CVE-2026-45482 8.4 HIGH Microsoft Visual Studio Code CoPilot Chat Security Feature Bypass Vulnerability
CVE-2026-45472 8.4 HIGH Microsoft Office Remote Code Execution Vulnerability

Showing top 20 of 200 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: .NET 10.0
Same vendor: Microsoft
Same weakness: CWE-400

V. Comments for CVE-2026-45591

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