CVE-2026-40379— Azure Entra ID Spoofing Vulnerability
Quick assessment
Affected
Microsoft Microsoft Entra
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 Azure Entra ID是美国Microsoft公司的一个基于云的身份和访问管理服务。 Microsoft Azure Entra ID存在安全漏洞，该漏洞源于混合身份同步缺陷。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Entra | - |
affected |
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I. Basic Information for CVE-2026-40379
Vulnerability Information
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Vulnerability Title
Azure Entra ID Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Azure Entra ID 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Azure Entra ID是美国Microsoft公司的一个基于云的身份和访问管理服务。 Microsoft Azure Entra ID存在安全漏洞，该漏洞源于混合身份同步缺陷。
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 | Microsoft Entra | - | - |
|
II. Public POCs for CVE-2026-40379
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-40379 (1)
Same Patch Batch · Microsoft · 2026-05-12 · 125 CVEs total
| CVE-2026-42823 | 9.9 CRITICAL | Azure Logic Apps Elevation of Privilege Vulnerability |
| CVE-2026-42898 | 9.9 CRITICAL | Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability |
| CVE-2026-41089 | 9.8 CRITICAL | Windows Netlogon Remote Code Execution Vulnerability |
| CVE-2026-41096 | 9.8 CRITICAL | Windows DNS Client Remote Code Execution Vulnerability |
| CVE-2026-40402 | 9.3 CRITICAL | Windows Hyper-V Elevation of Privilege Vulnerability |
| CVE-2026-42833 | 9.1 CRITICAL | Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability |
| CVE-2026-41103 | 9.1 CRITICAL | Microsoft SSO Plugin for Jira & Confluence Elevation of Privilege Vulnerability |
| CVE-2026-33117 | 9.1 CRITICAL | Azure SDK for Java Security Feature Bypass Vulnerability |
| CVE-2026-34329 | 8.8 HIGH | Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability |
| CVE-2026-40365 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-40370 | 8.8 HIGH | SQL Server Remote Code Execution Vulnerability |
| CVE-2026-35439 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-33110 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-33112 | 8.8 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2026-41613 | 8.8 HIGH | Visual Studio Code Elevation of Privilege Vulnerability |
| CVE-2026-40403 | 8.8 HIGH | Windows Graphics Component Remote Code Execution Vulnerability |
| CVE-2026-35436 | 8.8 HIGH | Microsoft Office Click-To-Run Elevation of Privilege Vulnerability |
| CVE-2026-41109 | 8.8 HIGH | GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability |
| CVE-2026-41094 | 8.8 HIGH | Microsoft Data Formulator Remote Code Execution Vulnerability |
| CVE-2026-41086 | 8.8 HIGH | Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability |
Showing top 20 of 125 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Microsoft Entra
-
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Same weakness: CWE-200
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V. Comments for CVE-2026-40379
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