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CVE-2025-55340— Windows Remote Desktop Protocol Security Feature Bypass

Quick assessment

Affected
Microsoft Windows 10 Version 21H2
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 Windows Remote Desktop Services是美国微软（Microsoft）公司的一个允许用户远程访问图形桌面和Windows应用程序的功能集合。 Microsoft Windows Remote Desktop Services存在授权问题漏洞，该漏洞源于攻击者利用该漏洞可以绕过某些功能。

CVSS 7.0 · High EPSS 0.31% · P21

Possible ATT&CK Techniques 1 AI

T1556.002 · Password Filter DLL
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I. Basic Information for CVE-2025-55340

Vulnerability Information
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Vulnerability Title
Windows Remote Desktop Protocol Security Feature Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Improper authentication in Windows Remote Desktop Protocol allows an authorized attacker to bypass a security feature locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Remote Desktop Services 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Remote Desktop Services是美国微软（Microsoft）公司的一个允许用户远程访问图形桌面和Windows应用程序的功能集合。 Microsoft Windows Remote Desktop Services存在授权问题漏洞，该漏洞源于攻击者利用该漏洞可以绕过某些功能。
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 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.6456 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.6456 -
Microsoft Windows 11 version 22H2 10.0.22621.0 ~ 10.0.22621.6060 -
Microsoft Windows 11 version 22H3 10.0.22631.0 ~ 10.0.22631.6060 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.6060 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.6899 -
Microsoft Windows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.6899 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.4294 -
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.1913 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.6899 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.6899 -

II. Public POCs for CVE-2025-55340

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III. Intelligence Information for CVE-2025-55340

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Same Patch Batch · Microsoft · 2025-10-14 · 167 CVEs total

CVE-2025-55315 9.9 CRITICAL ASP.NET Security Feature Bypass Vulnerability
CVE-2025-49708 9.9 CRITICAL Microsoft Graphics Component Elevation of Privilege Vulnerability
CVE-2025-59287 9.8 CRITICAL Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
CVE-2025-59295 8.8 HIGH Windows URL Parsing Remote Code Execution Vulnerability
CVE-2025-58718 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2025-59228 8.8 HIGH Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2025-59237 8.8 HIGH Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2025-58715 8.8 HIGH Windows Speech Runtime Elevation of Privilege Vulnerability
CVE-2025-58716 8.8 HIGH Windows Speech Runtime Elevation of Privilege Vulnerability
CVE-2025-59249 8.8 HIGH Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2025-59213 8.8 HIGH Configuration Manager Elevation of Privilege Vulnerability
CVE-2025-53782 8.4 HIGH Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2025-59236 8.4 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59292 8.2 HIGH Azure Compute Gallery Elevation of Privilege Vulnerability
CVE-2025-59291 8.2 HIGH Confidential Azure Container Instances Elevation of Privilege Vulnerability
CVE-2025-59250 8.1 HIGH JDBC Driver for SQL Server Spoofing Vulnerability
CVE-2025-59233 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59290 7.8 HIGH Windows Bluetooth Service Elevation of Privilege Vulnerability
CVE-2025-59231 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-59207 7.8 HIGH Windows Kernel Elevation of Privilege Vulnerability

Showing top 20 of 167 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 21H2
Same vendor: Microsoft
Same weakness: CWE-287

V. Comments for CVE-2025-55340

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