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CVE-2025-21311— Windows NTLM V1 Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 11 Version 24H2
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 NTLM是美国微软（Microsoft）公司的一个在包括运行Windows操作系统的系统以及独立系统在内的网络上使用的身份验证协议。 Microsoft NTLM存在安全漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2025 (Server Core installation),Windows Server 2022, 23H2 Edition (Server Core installation),Windows 11 Version 24H

CVSS 9.8 · Critical EPSS 2.23% · P82

Possible ATT&CK Techniques 1 AI

T1558.003 · Kerberoasting

Affected Version Matrix 4

VendorProduct Version RangeStatus
Microsoft Windows 11 Version 24H2 10.0.26100.0< 10.0.26100.2894 affected
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0< 10.0.25398.1369 affected
Microsoft Windows Server 2025 10.0.26100.0< 10.0.26100.2894 affected
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0< 10.0.26100.2894 affected
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I. Basic Information for CVE-2025-21311

Vulnerability Information
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Vulnerability Title
Windows NTLM V1 Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows NTLM V1 Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证算法的不正确实现
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft NTLM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft NTLM是美国微软（Microsoft）公司的一个在包括运行Windows操作系统的系统以及独立系统在内的网络上使用的身份验证协议。 Microsoft NTLM存在安全漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows Server 2025 (Server Core installation),Windows Server 2022, 23H2 Edition (Server Core installation),Windows 11 Version 24H
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)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.2894 -
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.1369 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.2894 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.2894 -

II. Public POCs for CVE-2025-21311

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III. Intelligence Information for CVE-2025-21311

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Vendor Advisories for CVE-2025-21311 (1)

Same Patch Batch · Microsoft · 2025-01-14 · 157 CVEs total

CVE-2025-21298 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2025-21307 9.8 CRITICAL Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
CVE-2025-21292 8.8 HIGH Windows Search Service Elevation of Privilege Vulnerability
CVE-2025-21266 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21282 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21293 8.8 HIGH Active Directory Domain Services Elevation of Privilege Vulnerability
CVE-2025-21291 8.8 HIGH Windows Direct Show Remote Code Execution Vulnerability
CVE-2025-21302 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21303 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21306 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21176 8.8 HIGH .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
CVE-2025-21178 8.8 HIGH Visual Studio Remote Code Execution Vulnerability
CVE-2025-21273 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21417 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21409 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21245 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21223 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21238 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21240 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21339 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability

Showing top 20 of 157 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 11 Version 24H2
Same vendor: Microsoft
Same weakness: CWE-303

V. Comments for CVE-2025-21311

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