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EPSS 0.2%top 92%

CVE-2026-45601: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607

0
High
VulnerabilityCVE-2026-45601cvecve-2026-45601cwe-362cwe-416gcve
Published: 06/09/2026 (06/09/2026, 17:05:34 UTC)
Source: CVE Database V5
Vendor/Project: Microsoft
Product: Windows 10 Version 1607

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS v3.1

Score 7.0high

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected software

Microsoft

Windows 10 Version 1607

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows 10 Version 1809

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows 10 Version 21H2

Affected versions
>=10.0.19044.0 <10.0.19044.7417

Microsoft

Windows 10 Version 22H2

Affected versions
>=10.0.19045.0 <10.0.19045.7417

Microsoft

Windows 11 version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 24H2

Affected versions
>=10.0.26100.0 <10.0.26100.8655

Microsoft

Windows 11 Version 25H2

Affected versions
>=10.0.26200.0 <10.0.26200.8655

Microsoft

Windows 11 version 26H1

Affected versions
>=10.0.28000.0 <10.0.28000.2269

Microsoft

Windows Server 2012

Affected versions
>=6.2.9200.0 <6.2.9200.26132

Microsoft

Windows Server 2012 (Server Core installation)

Affected versions
>=6.2.9200.0 <6.2.9200.26132

Microsoft

Windows Server 2012 R2

Affected versions
>=6.3.9600.0 <6.3.9600.23228

Microsoft

Windows Server 2012 R2 (Server Core installation)

Affected versions
>=6.3.9600.0 <6.3.9600.23228

Microsoft

Windows Server 2016

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows Server 2016 (Server Core installation)

Affected versions
>=10.0.14393.0 <10.0.14393.9234

Microsoft

Windows Server 2019

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows Server 2019 (Server Core installation)

Affected versions
>=10.0.17763.0 <10.0.17763.8880

Microsoft

Windows Server 2022

Affected versions
>=10.0.20348.0 <10.0.20348.5256

Microsoft

Windows Server 2025

Affected versions
>=10.0.26100.0 <10.0.26100.32995

Microsoft

Windows Server 2025 (Server Core installation)

Affected versions
>=10.0.26100.0 <10.0.26100.32995

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/14/2026, 13:40:53 UTC

Technical Analysis

This vulnerability involves a concurrent execution issue caused by improper synchronization in the Windows Ancillary Function Driver for WinSock on Windows 10 Version 1607 (build 10.0.14393.0). An authorized local attacker can exploit this race condition to elevate their privileges on the affected system. The issue is tracked under CWE-362 and has been assigned CVE-2026-45601. Microsoft has released an official fix to address this vulnerability.

Potential Impact

Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher-level access to the affected system. This can lead to full system compromise depending on the privileges obtained. The CVSS v3.1 base score is 7.0, indicating high severity with high impact on confidentiality, integrity, and availability.

Mitigation Recommendations

An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45601 to remediate this vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
microsoft
Date Reserved
2026-05-12T19:55:45.730Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
official-fix
Vendor Advisory Urls
[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45601","vendor":"Microsoft"}]

Threat ID: 6a284ce48dd33fbd85664e5e

Added to database: 06/09/2026, 17:27:00 UTC

Last enriched: 08/14/2026, 13:40:53 UTC

Last updated: 09/11/2026, 07:31:53 UTC

Views: 84

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