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CVE-2025-21418— Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1507
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Windows Ancillary Function Driver for WinSock是美国微软（Microsoft）公司的Winsock的辅助功能驱动程序。 Microsoft Windows Ancillary Function Driver for WinSock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 10 Version 1809 for 32-bit Systems,Windows 10 Version 1809 for x64

CVSS 7.8 · High KEV EPSS 1.54% · P73

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-21418

Vulnerability Information
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Vulnerability Title
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Ancillary Function Driver for WinSock 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Ancillary Function Driver for WinSock是美国微软（Microsoft）公司的Winsock的辅助功能驱动程序。 Microsoft Windows Ancillary Function Driver for WinSock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 10 Version 1809 for 32-bit Systems,Windows 10 Version 1809 for x64
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Windows 10 Version 1507 10.0.10240.0 ~ 10.0.10240.20915 -
Microsoft Windows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.7785 -
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.6893 -
Microsoft Windows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.5487 -
Microsoft Windows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.5487 -
Microsoft Windows 11 version 22H2 10.0.22621.0 ~ 10.0.22621.4890 -
Microsoft Windows 11 version 22H3 10.0.22631.0 ~ 10.0.22631.4890 -
Microsoft Windows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.4890 -
Microsoft Windows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.3194 -
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 ~ 6.1.7601.27566 -
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 ~ 6.1.7601.27566 -
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 ~ 6.0.6003.23117 -
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 ~ 6.0.6003.23117 -
Microsoft Windows Server 2012 6.2.9200.0 ~ 6.2.9200.25317 -
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.25317 -
Microsoft Windows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.22417 -
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.22417 -
Microsoft Windows Server 2016 10.0.14393.0 ~ 10.0.14393.7785 -
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.7785 -
Microsoft Windows Server 2019 10.0.17763.0 ~ 10.0.17763.6893 -
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.6893 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.3207 -
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.1425 -
Microsoft Windows Server 2025 10.0.26100.0 ~ 10.0.26100.3194 -
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.3194 -

II. Public POCs for CVE-2025-21418

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III. Intelligence Information for CVE-2025-21418

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Vendor Advisories for CVE-2025-21418 (1)

Same Patch Batch · Microsoft · 2025-02-11 · 55 CVEs total

CVE-2025-21198 9.0 CRITICAL Microsoft High Performance Compute (HPC) Pack Remote Code Execution Vulnerability
CVE-2025-21406 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21201 8.8 HIGH Windows Telephony Server Remote Code Execution Vulnerability
CVE-2025-21190 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21200 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21407 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21371 8.8 HIGH Windows Telephony Service Remote Code Execution Vulnerability
CVE-2025-21369 8.8 HIGH Microsoft Digest Authentication Remote Code Execution Vulnerability
CVE-2025-21368 8.8 HIGH Microsoft Digest Authentication Remote Code Execution Vulnerability
CVE-2025-21410 8.8 HIGH Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2025-21208 8.8 HIGH Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2025-21376 8.1 HIGH Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
CVE-2025-21400 8.0 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2025-21387 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-21358 7.8 HIGH Windows Core Messaging Elevation of Privileges Vulnerability
CVE-2025-21367 7.8 HIGH Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability
CVE-2025-21359 7.8 HIGH Windows Kernel Security Feature Bypass Vulnerability
CVE-2025-21392 7.8 HIGH Microsoft Office Remote Code Execution Vulnerability
CVE-2025-21386 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2025-21381 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability

Showing top 20 of 55 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1507
Same vendor: Microsoft
Same weakness: CWE-122

V. Comments for CVE-2025-21418

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