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CVE-2026-45601— Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

CVSS 7.0 · High EPSS 0.05% · P16

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 20

VendorProductVersion RangeStatus
MicrosoftWindows 10 Version 160710.0.14393.0< 10.0.14393.9234affected
MicrosoftWindows 10 Version 180910.0.17763.0< 10.0.17763.8880affected
MicrosoftWindows 10 Version 21H210.0.19044.0< 10.0.19044.7417affected
MicrosoftWindows 10 Version 22H210.0.19045.0< 10.0.19045.7417affected
MicrosoftWindows 11 version 23H210.0.22631.0< 10.0.22631.7219affected
MicrosoftWindows 11 Version 23H210.0.22631.0< 10.0.22631.7219affected
MicrosoftWindows 11 Version 24H210.0.26100.0< 10.0.26100.8655affected
MicrosoftWindows 11 Version 25H210.0.26200.0< 10.0.26200.8655affected
MicrosoftWindows 11 version 26H110.0.28000.0< 10.0.28000.2269affected
MicrosoftWindows Server 20126.2.9200.0< 6.2.9200.26132affected
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0< 6.2.9200.26132affected
MicrosoftWindows Server 2012 R26.3.9600.0< 6.3.9600.23228affected
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0< 6.3.9600.23228affected
MicrosoftWindows Server 201610.0.14393.0< 10.0.14393.9234affected
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0< 10.0.14393.9234affected
MicrosoftWindows Server 201910.0.17763.0< 10.0.17763.8880affected
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0< 10.0.17763.8880affected
MicrosoftWindows Server 202210.0.20348.0< 10.0.20348.5256affected
MicrosoftWindows Server 202510.0.26100.0< 10.0.26100.32995affected
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0< 10.0.26100.32995affected
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I. Basic Information for CVE-2026-45601

Vulnerability Information
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Vulnerability Title
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftWindows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.9234 -
MicrosoftWindows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.8880 -
MicrosoftWindows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.7417 -
MicrosoftWindows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.7417 -
MicrosoftWindows 11 version 23H2 10.0.22631.0 ~ 10.0.22631.7219 -
MicrosoftWindows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.7219 -
MicrosoftWindows 11 Version 24H2 10.0.26100.0 ~ 10.0.26100.8655 -
MicrosoftWindows 11 Version 25H2 10.0.26200.0 ~ 10.0.26200.8655 -
MicrosoftWindows 11 version 26H1 10.0.28000.0 ~ 10.0.28000.2269 -
MicrosoftWindows Server 2012 6.2.9200.0 ~ 6.2.9200.26132 -
MicrosoftWindows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.26132 -
MicrosoftWindows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.23228 -
MicrosoftWindows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.23228 -
MicrosoftWindows Server 2016 10.0.14393.0 ~ 10.0.14393.9234 -
MicrosoftWindows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.9234 -
MicrosoftWindows Server 2019 10.0.17763.0 ~ 10.0.17763.8880 -
MicrosoftWindows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.8880 -
MicrosoftWindows Server 2022 10.0.20348.0 ~ 10.0.20348.5256 -
MicrosoftWindows Server 2025 10.0.26100.0 ~ 10.0.26100.32995 -
MicrosoftWindows Server 2025 (Server Core installation) 10.0.26100.0 ~ 10.0.26100.32995 -

II. Public POCs for CVE-2026-45601

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III. Intelligence Information for CVE-2026-45601

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Same Patch Batch · Microsoft · 2026-06-09 · 200 CVEs total

CVE-2026-456579.8 CRITICALWindows Kernel Remote Code Execution Vulnerability
CVE-2026-476439.8 CRITICALAzure Stack Edge Remote Code Execution Vulnerability
CVE-2026-472919.8 CRITICALHTTP.sys Remote Code Execution Vulnerability
CVE-2026-261429.8 CRITICALNuance PowerScribe Remote Code Execution Vulnerability
CVE-2026-448159.8 CRITICALDHCP Client Service Remote Code Execution Vulnerability
CVE-2026-472819.6 CRITICALVisual Studio Code Elevation of Privilege Vulnerability
CVE-2026-429049.6 CRITICALWindows TCP/IP Elevation of Privilege Vulnerability
CVE-2026-456029.1 CRITICALWindows Dynamic Host Configuration Protocol (DHCP) Tampering Vulnerability
CVE-2026-476538.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2026-456488.8 HIGHWindows Active Directory Domain Services Remote Code Execution Vulnerability
CVE-2026-455048.8 HIGHMicrosoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-472898.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2026-321938.8 HIGHAzure Kubernetes Service (AKS) Remote Code Execution Vulnerability
CVE-2026-454848.8 HIGHMicrosoft SharePoint Elevation of Privilege Vulnerability
CVE-2026-429858.8 HIGHRemote Desktop Client Remote Code Execution Vulnerability
CVE-2026-403718.8 HIGHMicrosoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability
CVE-2026-454638.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-456418.4 HIGHWindows Hyper-V Remote Code Execution Vulnerability
CVE-2026-454828.4 HIGHMicrosoft Visual Studio Code CoPilot Chat Security Feature Bypass Vulnerability
CVE-2026-454728.4 HIGHMicrosoft Office Remote Code Execution Vulnerability

Showing top 20 of 200 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1607
Same vendor: Microsoft
Same weakness: CWE-362

V. Comments for CVE-2026-45601

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