CVE-2026-20826: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
Concurrent execution using shared resource with improper synchronization ('race condition') in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the TWINUI subsystem of Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization when accessing shared resources can be exploited by an authorized local attacker to gain elevated privileges. The issue is documented under CVE-2026-20826 with a CVSS 3.1 score of 7.8, indicating high impact on confidentiality, integrity, and availability. The vulnerability is not related to cloud services and no known exploits are reported in the wild. A patch is available to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition vulnerability to elevate their privileges on the affected Windows 10 system. This could lead to full system compromise, affecting confidentiality, integrity, and availability of the system. No known active exploitation has been reported.
Mitigation Recommendations
A patch is available for this vulnerability and should be applied promptly to affected Windows 10 Version 1607 systems. Since this is a local privilege escalation issue, applying the official update from Microsoft is the primary mitigation. No additional vendor advisory content contradicts this guidance.
CVE-2026-20826: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Tablet Windows User Interface (TWINUI) Subsystem 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 the TWINUI subsystem of Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization when accessing shared resources can be exploited by an authorized local attacker to gain elevated privileges. The issue is documented under CVE-2026-20826 with a CVSS 3.1 score of 7.8, indicating high impact on confidentiality, integrity, and availability. The vulnerability is not related to cloud services and no known exploits are reported in the wild. A patch is available to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition vulnerability to elevate their privileges on the affected Windows 10 system. This could lead to full system compromise, affecting confidentiality, integrity, and availability of the system. No known active exploitation has been reported.
Mitigation Recommendations
A patch is available for this vulnerability and should be applied promptly to affected Windows 10 Version 1607 systems. Since this is a local privilege escalation issue, applying the official update from Microsoft is the primary mitigation. No additional vendor advisory content contradicts this guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.374Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668adda60475309f9adfdb
Added to database: 1/13/2026, 6:11:41 PM
Last enriched: 4/3/2026, 12:42:56 PM
Last updated: 5/10/2026, 9:07:57 AM
Views: 83
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