CVE-2026-20867: 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 of concurrent execution using shared resources can be exploited by an authorized local attacker to elevate privileges. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and low privileges but no user interaction, and successful exploitation results in complete compromise of confidentiality, integrity, and availability. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition to elevate privileges, potentially gaining higher system rights and full control over the affected system. This can lead to unauthorized access to sensitive information, modification of system settings, and disruption of system availability.
Mitigation Recommendations
A patch is available from Microsoft to fix this vulnerability. It is recommended to apply the official update for Windows 10 Version 1809 as soon as possible to mitigate the risk. Since this is a local privilege escalation vulnerability, applying the patch will effectively prevent exploitation.
CVE-2026-20867: 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.
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 of concurrent execution using shared resources can be exploited by an authorized local attacker to elevate privileges. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and low privileges but no user interaction, and successful exploitation results in complete compromise of confidentiality, integrity, and availability. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition to elevate privileges, potentially gaining higher system rights and full control over the affected system. This can lead to unauthorized access to sensitive information, modification of system settings, and disruption of system availability.
Mitigation Recommendations
A patch is available from Microsoft to fix this vulnerability. It is recommended to apply the official update for Windows 10 Version 1809 as soon as possible to mitigate the risk. Since this is a local privilege escalation vulnerability, applying the patch will effectively prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.381Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae0a60475309f9ae139
Added to database: 1/13/2026, 6:11:44 PM
Last enriched: 4/3/2026, 12:47:23 PM
Last updated: 5/10/2026, 9:07:29 AM
Views: 93
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.