CVE-2021-40456— Windows AD FS Security Feature Bypass Vulnerability
Quick assessment
Affected
Microsoft Windows Server 2019
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 Active Directory Federation Services是美国微软（Microsoft）公司的一个在Windows Server操作系统上运行的软件组件。它为用户提供对无法通过Active Directory ( AD )使用集成Windows身份验证 (IWA) 的系统和应用程序的单点登录访问。 Microsoft Windows AD FS Server存在安全特征问题漏洞。以下产品和版本受到影响：Windows Server 2019,Windows Server
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-40456
Vulnerability Information
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Vulnerability Title
Windows AD FS Security Feature Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows AD FS Security Feature Bypass Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Active Directory Federation Services 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Active Directory Federation Services是美国微软（Microsoft）公司的一个在Windows Server操作系统上运行的软件组件。它为用户提供对无法通过Active Directory ( AD )使用集成Windows身份验证 (IWA) 的系统和应用程序的单点登录访问。 Microsoft Windows AD FS Server存在安全特征问题漏洞。以下产品和版本受到影响：Windows Server 2019,Windows Server
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 | Windows Server 2019 | 10.0.0 ~ 10.0.17763.2237 |
cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2237:*:*:*:*:*:*:*
|
|
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 ~ 10.0.17763.2237 |
cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2237:*:*:*:*:*:*:*
|
|
| Microsoft | Windows Server 2022 | 10.0.0 ~ 10.0.20348.288 |
cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.288:*:*:*:*:*:*:*
|
|
| Microsoft | Windows Server version 2004 | 10.0.0 ~ 10.0.19041.1288 |
cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1288:*:*:*:*:*:*:*
|
|
| Microsoft | Windows Server version 20H2 | 10.0.0 ~ 10.0.19042.1288 |
cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1288:*:*:*:*:*:*:*
|
|
II. Public POCs for CVE-2021-40456
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2021-40456 (1)
Same Patch Batch · Microsoft · 2021-10-13 · 71 CVEs total
| CVE-2021-26427 | 9.0 CRITICAL | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-36970 | 8.8 HIGH | Windows Print Spooler Spoofing Vulnerability |
| CVE-2021-41344 | 8.1 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2021-40487 | 8.1 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2021-41348 | 8.0 HIGH | Microsoft Exchange Server Elevation of Privilege Vulnerability |
| CVE-2021-40461 | 8.0 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2021-38672 | 8.0 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2021-40464 | 8.0 HIGH | Windows Nearby Sharing Elevation of Privilege Vulnerability |
| CVE-2021-40450 | 7.8 HIGH | Win32k Elevation of Privilege Vulnerability |
| CVE-2021-40462 | 7.8 HIGH | Windows Media Foundation Dolby Digital Atmos Decoders Remote Code Execution Vulnerability |
| CVE-2021-40449 | 7.8 HIGH | Win32k Elevation of Privilege Vulnerability |
| CVE-2021-40473 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40474 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40477 | 7.8 HIGH | Windows Event Tracing Elevation of Privilege Vulnerability |
| CVE-2021-40478 | 7.8 HIGH | Storage Spaces Controller Elevation of Privilege Vulnerability |
| CVE-2021-40480 | 7.8 HIGH | Microsoft Office Visio Remote Code Execution Vulnerability |
| CVE-2021-40485 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40486 | 7.8 HIGH | Microsoft Word Remote Code Execution Vulnerability |
| CVE-2021-40479 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40467 | 7.8 HIGH | Windows Common Log File System Driver Elevation of Privilege Vulnerability |
Showing top 20 of 71 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-40456
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