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CVE-2026-45491— .NET Tampering Vulnerability

CVSS 6.2 · Medium EPSS 0.39% · P32

Affected Version Matrix 4

VendorProductVersion RangeStatus
Microsoft.NET 10.010.0.0< 10.0.9affected
Microsoft.NET 8.08.0< 8.0.28affected
8.0.0< 8.0.28affected
Microsoft.NET 9.09.0.0< 9.0.17affected
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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

VendorProductAffected VersionsCPESubscribe
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-2026-261429.8 CRITICALNuance PowerScribe Remote Code Execution Vulnerability
CVE-2026-476439.8 CRITICALAzure Stack Edge Remote Code Execution Vulnerability
CVE-2026-456579.8 CRITICALWindows Kernel Remote Code Execution Vulnerability
CVE-2026-448159.8 CRITICALDHCP Client Service Remote Code Execution Vulnerability
CVE-2026-472919.8 CRITICALHTTP.sys Remote Code Execution Vulnerability
CVE-2026-472819.6 CRITICALVisual Studio Code Elevation of Privilege Vulnerability
CVE-2026-429049.6 CRITICALWindows TCP/IP Elevation of Privilege Vulnerability
CVE-2026-456029.1 CRITICALWindows Dynamic Host Configuration Protocol (DHCP) Tampering Vulnerability
CVE-2026-472898.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2026-455048.8 HIGHMicrosoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-456488.8 HIGHWindows Active Directory Domain Services Remote Code Execution Vulnerability
CVE-2026-321938.8 HIGHAzure Kubernetes Service (AKS) Remote Code Execution Vulnerability
CVE-2026-403718.8 HIGHMicrosoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability
CVE-2026-454848.8 HIGHMicrosoft SharePoint Elevation of Privilege Vulnerability
CVE-2026-476538.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2026-429858.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2026-476358.4 HIGHMicrosoft Outlook and Word Remote Code Execution Vulnerability
CVE-2026-454618.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-454638.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-456078.4 HIGHWindows 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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