CVE-2026-20918: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1809
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves concurrent execution using a shared resource with improper synchronization (CWE-362) in Windows Management Services on Windows 10 Version 1809. An authorized local attacker can exploit this race condition to elevate privileges. The issue affects Windows 10 Version 1809 build 10.0.17763.0. Microsoft has published an official fix to address this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially gaining higher system rights. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
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-2026-20918 to remediate this vulnerability.
CVE-2026-20918: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1809
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2022, 23H2 Edition (Server Core installation)
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves concurrent execution using a shared resource with improper synchronization (CWE-362) in Windows Management Services on Windows 10 Version 1809. An authorized local attacker can exploit this race condition to elevate privileges. The issue affects Windows 10 Version 1809 build 10.0.17763.0. Microsoft has published an official fix to address this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially gaining higher system rights. This can lead to full system compromise, including confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
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-2026-20918 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.334Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20918","vendor":"Microsoft"}]
Threat ID: 69668ae1a60475309f9ae17b
Added to database: 01/13/2026, 18:11:45 UTC
Last enriched: 07/30/2026, 23:41:29 UTC
Last updated: 09/10/2026, 22:25:55 UTC
Views: 258
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