CVE-2026-20874: 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 a race condition (CWE-362) in Windows Management Services on Windows 10 Version 1809 (build 10.0.17763.0). Improper synchronization during concurrent execution of shared resources can be exploited by an authorized local attacker to elevate privileges. The issue is recognized and patched by Microsoft, with an official fix released. The CVSS 3.1 vector indicates local attack vector, high attack complexity, low privileges required, no user interaction, and impacts confidentiality, integrity, and availability with high severity.
Potential Impact
An authorized local attacker can exploit this race condition vulnerability to elevate their privileges on the affected system. This could lead to full system compromise, including unauthorized access to sensitive information, modification of system settings, and disruption of system availability.
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-2026-20874 to remediate this vulnerability.
CVE-2026-20874: 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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition (CWE-362) in Windows Management Services on Windows 10 Version 1809 (build 10.0.17763.0). Improper synchronization during concurrent execution of shared resources can be exploited by an authorized local attacker to elevate privileges. The issue is recognized and patched by Microsoft, with an official fix released. The CVSS 3.1 vector indicates local attack vector, high attack complexity, low privileges required, no user interaction, and impacts confidentiality, integrity, and availability with high severity.
Potential Impact
An authorized local attacker can exploit this race condition vulnerability to elevate their privileges on the affected system. This could lead to full system compromise, including unauthorized access to sensitive information, modification of system settings, and disruption of system availability.
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-2026-20874 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.386Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20874","vendor":"Microsoft"}]
Threat ID: 69668ae1a60475309f9ae16f
Added to database: 01/13/2026, 18:11:45 UTC
Last enriched: 07/30/2026, 23:42:10 UTC
Last updated: 09/10/2026, 19:24:58 UTC
Views: 145
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