CVE-2026-20873: 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 (build 10.0.17763.0). An authorized local attacker can exploit this race condition to elevate privileges. The vulnerability is addressed by an official patch from Microsoft as detailed in their security update guide.
Potential Impact
An authorized local attacker can exploit this race condition to gain elevated privileges, potentially leading to full system compromise. The vulnerability affects confidentiality, integrity, and availability with high impact ratings according to the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20873 to remediate this vulnerability.
CVE-2026-20873: 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 concurrent execution using a shared resource with improper synchronization (CWE-362) in Windows Management Services on Windows 10 Version 1809 (build 10.0.17763.0). An authorized local attacker can exploit this race condition to elevate privileges. The vulnerability is addressed by an official patch from Microsoft as detailed in their security update guide.
Potential Impact
An authorized local attacker can exploit this race condition to gain elevated privileges, potentially leading to full system compromise. The vulnerability affects confidentiality, integrity, and availability with high impact ratings according to the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20873 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.382Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20873","vendor":"Microsoft"}]
Threat ID: 69668ae1a60475309f9ae16c
Added to database: 01/13/2026, 18:11:45 UTC
Last enriched: 07/30/2026, 23:42:18 UTC
Last updated: 09/10/2026, 19:24:58 UTC
Views: 178
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