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CVE-2026-40372— ASP.NET Core Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft ASP.NET Core 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存在数据伪造问题漏洞，该漏洞源于加密签名验证不当，可能导致未经授权的攻击者通过网络提升权限。

CVSS 9.1 · Critical EPSS 0.82% · P56

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Microsoft ASP.NET Core 10.0 10.0< 10.0.7 affected
Microsoft Microsoft Visual Studio 2026 version 18.5 18.5.0< 18.5.2 affected
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I. Basic Information for CVE-2026-40372

Vulnerability Information
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Vulnerability Title
ASP.NET Core Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges 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:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft ASP.NET Core 数据伪造问题漏洞
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存在数据伪造问题漏洞，该漏洞源于加密签名验证不当，可能导致未经授权的攻击者通过网络提升权限。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft ASP.NET Core 10.0 10.0 ~ 10.0.7 -
Microsoft Microsoft Visual Studio 2026 version 18.5 18.5.0 ~ 18.5.2 -

II. Public POCs for CVE-2026-40372

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III. Intelligence Information for CVE-2026-40372

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IV. Related Vulnerabilities

Same product: ASP.NET Core 10.0
Same vendor: Microsoft
Same weakness: CWE-347

V. Comments for CVE-2026-40372

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