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CVE-2026-34331: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607

0
High
VulnerabilityCVE-2026-34331cvecve-2026-34331cwe-362cwe-416
Published: 05/12/2026 (05/12/2026, 16:58:22 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 Win32K - GRFX 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 <10.0.14393.9140

Microsoft

Windows 10 Version 1809

Affected versions
>=10.0.17763.0 <10.0.17763.8755

Microsoft

Windows 10 Version 21H2

Affected versions
>=10.0.19044.0 <10.0.19044.7291

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 <10.0.22631.7079

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 <10.0.26100.8457

Microsoft

Windows 11 Version 25H2

Affected versions
>=10.0.26200.0 <10.0.26200.8457

Microsoft

Windows 11 version 26H1

Affected versions
>=10.0.28000.0 <10.0.28000.2113

Microsoft

Windows Server 2012

Affected versions
>=6.2.9200.0 <6.2.9200.26079

Microsoft

Windows Server 2012 (Server Core installation)

Affected versions
>=6.2.9200.0 <6.2.9200.26079

Microsoft

Windows Server 2012 R2

Affected versions
>=6.3.9600.0 <6.3.9600.23181

Microsoft

Windows Server 2012 R2 (Server Core installation)

Affected versions
>=6.3.9600.0 <6.3.9600.23181

Microsoft

Windows Server 2016

Affected versions
>=10.0.14393.0 <10.0.14393.9140

Microsoft

Windows Server 2016 (Server Core installation)

Affected versions
>=10.0.14393.0 <10.0.14393.9140

Microsoft

Windows Server 2019

Affected versions
>=10.0.17763.0 <10.0.17763.8755

Microsoft

Windows Server 2019 (Server Core installation)

Affected versions
>=10.0.17763.0 <10.0.17763.8755

Microsoft

Windows Server 2022

Affected versions
>=10.0.20348.0 <10.0.20348.5139

Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)

Affected versions
>=10.0.25398.0 <10.0.25398.2330

Microsoft

Windows Server 2025

Affected versions
>=10.0.26100.0 <10.0.26100.32860

Microsoft

Windows Server 2025 (Server Core installation)

Affected versions
>=10.0.26100.0 <10.0.26100.32860

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/11/2026, 16:36:30 UTC

Technical Analysis

This vulnerability involves a race condition (CWE-362) in the Windows Win32K graphics subsystem (GRFX) in Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization during concurrent execution of shared resources can be exploited by an authorized local attacker to elevate privileges. The flaw affects the specified Windows 10 version and has been assigned CVE-2026-34331. Microsoft has released an official fix to address this issue.

Potential Impact

Successful exploitation allows a local attacker with authorized access to elevate their privileges, potentially gaining higher system rights. This can lead to full system compromise depending on the privileges gained. The vulnerability does not require user interaction but does require local access and has a high attack complexity.

Mitigation Recommendations

An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34331 to remediate this vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
microsoft
Date Reserved
2026-03-26T21:02:16.445Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
official-fix
Vendor Advisory Urls
[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34331","vendor":"Microsoft"}]

Threat ID: 6a03653ccbff5d861008c3dc

Added to database: 05/12/2026, 17:37:00 UTC

Last enriched: 08/11/2026, 16:36:30 UTC

Last updated: 09/14/2026, 22:01:33 UTC

Views: 82

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