CVE-2026-21231: 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 Windows Kernel allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-21231) involves a race condition (CWE-362) in the Windows Kernel of Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization during concurrent execution using shared resources can be exploited by an authorized local attacker to elevate privileges. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges, potentially gaining higher system rights. This can lead to full system compromise, including unauthorized access to sensitive data and disruption of system availability. However, exploitation requires local access and high attack complexity.
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-2026-21231 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
CVE-2026-21231: 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 Windows Kernel allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-21231) involves a race condition (CWE-362) in the Windows Kernel of Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization during concurrent execution using shared resources can be exploited by an authorized local attacker to elevate privileges. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges, potentially gaining higher system rights. This can lead to full system compromise, including unauthorized access to sensitive data and disruption of system availability. However, exploitation requires local access and high attack complexity.
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-2026-21231 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-11T21:02:05.734Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21231","vendor":"Microsoft"}]
Threat ID: 698b75fd4b57a58fa1209fac
Added to database: 2/10/2026, 6:16:29 PM
Last enriched: 5/12/2026, 5:10:24 AM
Last updated: 5/21/2026, 3:13:30 PM
Views: 215
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