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CVE-2026-45491— .NET Tampering 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 .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存在后置链接漏洞。攻击者利用该漏洞可以篡改信息。以下产品和版本受到影响：.NET 10.0 installed on Windows,.NET 10.0 installed on Mac OS,.NET 10.0 installed on Linux,.NET 8.0,.NET 8.0 installed on Windows,.NET 8

CVSS 6.2 · Medium EPSS 0.37% · P29

Affected Version Matrix 4

VendorProduct Version RangeStatus
Microsoft .NET 10.0 10.0.0< 10.0.9 affected
Microsoft .NET 8.0 8.0< 8.0.28 affected
8.0.0< 8.0.28 affected
Microsoft .NET 9.0 9.0.0< 9.0.17 affected
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I. Basic Information for CVE-2026-45491

Vulnerability Information
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Vulnerability Title
.NET Tampering Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft .NET 后置链接漏洞
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存在后置链接漏洞。攻击者利用该漏洞可以篡改信息。以下产品和版本受到影响：.NET 10.0 installed on Windows,.NET 10.0 installed on Mac OS,.NET 10.0 installed on Linux,.NET 8.0,.NET 8.0 installed on Windows,.NET 8
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 ~ 8.0.28 -
Microsoft .NET 8.0 8.0.0 ~ 8.0.28 -
Microsoft .NET 9.0 9.0.0 ~ 9.0.17 -

II. Public POCs for CVE-2026-45491

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III. Intelligence Information for CVE-2026-45491

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Vendor Advisories for CVE-2026-45491 (1)

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

CVE-2026-26142 9.8 CRITICAL Nuance PowerScribe Remote Code Execution Vulnerability
CVE-2026-47643 9.8 CRITICAL Azure Stack Edge Remote Code Execution Vulnerability
CVE-2026-45657 9.8 CRITICAL Windows Kernel Remote Code Execution Vulnerability
CVE-2026-44815 9.8 CRITICAL DHCP Client Service Remote Code Execution Vulnerability
CVE-2026-47291 9.8 CRITICAL HTTP.sys 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-2026-47289 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-45504 8.8 HIGH Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-45648 8.8 HIGH Windows Active Directory Domain Services Remote Code Execution Vulnerability
CVE-2026-32193 8.8 HIGH Azure Kubernetes Service (AKS) Remote Code Execution Vulnerability
CVE-2026-40371 8.8 HIGH Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability
CVE-2026-45484 8.8 HIGH Microsoft SharePoint Elevation of Privilege Vulnerability
CVE-2026-47653 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-42985 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-47635 8.4 HIGH Microsoft Outlook and Word Remote Code Execution Vulnerability
CVE-2026-45461 8.4 HIGH Microsoft Office Remote Code Execution Vulnerability
CVE-2026-45463 8.4 HIGH Microsoft Office Remote Code Execution Vulnerability
CVE-2026-45607 8.4 HIGH Windows Hyper-V 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-59

V. Comments for CVE-2026-45491

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