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CVE-2026-118746— .NET Security Feature Bypass Vulnerability

Quick assessment

Affected
Microsoft .NET 11.0 installed on Linux
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.

.NET 中的“非安全失败”（即“开放式失败”）漏洞允许未授权的攻击者通过网络绕过安全功能。

CVSS 6.8 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Microsoft .NET 11.0 installed on Linux 11.0.0-preview.1< 11.0.0 affected
Microsoft .NET 11.0 installed on Mac OS 11.0.0-preview.1< 11.0.0 affected
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I. Basic Information for CVE-2026-118746

Vulnerability Information
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Vulnerability Title
.NET Security Feature Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未能安全地进行程序失效(Failing Open)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft .NET 11.0 installed on Linux 11.0.0-preview.1 ~ 11.0.0 -
Microsoft .NET 11.0 installed on Mac OS 11.0.0-preview.1 ~ 11.0.0 -

II. Public POCs for CVE-2026-118746

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-118746

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Other References for CVE-2026-118746 (1)

Same Patch Batch · Microsoft · 2026-11-10 · 1094 CVEs total

CVE-2026-120002 9.9 CRITICAL Microsoft SharePoint Server Elevation of Privilege Vulnerability
CVE-2026-109467 9.9 CRITICAL Azure DevOps Server Remote Code Execution Vulnerability
CVE-2026-85844 9.8 CRITICAL Windows Kerberos Elevation of Privilege Vulnerability
CVE-2026-66801 9.8 CRITICAL Microsoft Xbox Remote Code Execution Vulnerability
CVE-2026-88218 9.8 CRITICAL Windows DNS Remote Code Execution Vulnerability
CVE-2026-95882 9.8 CRITICAL Microsoft DirectMusic Remote Code Execution Vulnerability
CVE-2026-95901 9.8 CRITICAL Microsoft DirectMusic Remote Code Execution Vulnerability
CVE-2026-96078 9.8 CRITICAL Microsoft Color Management Remote Code Execution Vulnerability
CVE-2026-88234 9.8 CRITICAL Windows iSCSI Remote Code Execution Vulnerability
CVE-2026-88243 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-96067 9.8 CRITICAL Microsoft Color Management Remote Code Execution Vulnerability
CVE-2026-96157 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2026-112967 9.8 CRITICAL Windows Xbox Live Networking Service Remote Code Execution Vulnerability
CVE-2026-114160 9.8 CRITICAL Azure Managed Grafana Elevation of Privilege Vulnerability
CVE-2026-119990 9.8 CRITICAL Azure OpenAI Elevation of Privilege Vulnerability
CVE-2026-116928 9.8 CRITICAL Windows Search Remote Code Execution Vulnerability
CVE-2026-119958 9.8 CRITICAL Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution Vulnerability
CVE-2026-116945 9.8 CRITICAL Microsoft SQL Server Remote Code Execution Vulnerability
CVE-2026-120779 9.6 CRITICAL Visual Studio Code Remote Code Execution Vulnerability
CVE-2026-118740 9.1 CRITICAL Aspire Security Feature Bypass Vulnerability

Showing top 20 of 1094 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: .NET 11.0 installed on Linux
Same vendor: Microsoft
Same weakness: CWE-636