CVE-2021-42306— Azure Active Directory Information Disclosure Vulnerability
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I. Basic Information for CVE-2021-42306
Vulnerability Information
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Vulnerability Title
Azure Active Directory Information Disclosure Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application. Azure AD addressed this vulnerability by preventing disclosure of any private key values added to the application. Microsoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information. For more details on this issue, please refer to the MSRC Blog Entry.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Azure Active Directory 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows是美国微软（Microsoft）公司的一种桌面操作系统。 Microsoft Azure Active Directory 存在信息泄露漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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 | Azure Automation | 1.0.0 ~ publication | cpe:2.3:a:microsoft:azure_automation:-:*:*:*:*:*:*:* | |
| Microsoft | Azure Active Directory | N/A | - | |
| Microsoft | Azure Site Recovery | N/A | - | |
| Microsoft | Azure Migrate | N/A | - |
II. Public POCs for CVE-2021-42306
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|---|
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Same Patch Batch · Microsoft · 2021-11-24 · 6 CVEs total
| CVE-2021-43211 | 5.5 MEDIUM | Windows 10 Update Assistant Elevation of Privilege Vulnerability |
| CVE-2021-42297 | 5.0 MEDIUM | Windows 10 Update Assistant Elevation of Privilege Vulnerability |
| CVE-2021-43221 | 4.2 MEDIUM | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability |
| CVE-2021-43220 | 3.1 LOW | Microsoft Edge for iOS Spoofing Vulnerability |
| CVE-2021-42308 | 3.1 LOW | Microsoft Edge (Chromium-based) Spoofing Vulnerability |
IV. Related Vulnerabilities
Same vendor: Microsoft
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Azure DevOps Information Disclosure Vulnerability - CVE-2026-35428
Azure Cloud Shell Spoofing Vulnerability - CVE-2026-35435
Azure AI Foundry Elevation of Privilege Vulnerability - CVE-2026-34327
Microsoft Partner Center Spoofing Vulnerability - CVE-2026-33844
Azure Managed Instance for Apache Cassandra Remote Code Exec
V. Comments for CVE-2021-42306
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