CVE-2026-27927: 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 Projected File System allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the Windows Projected File System on Windows 10 Version 1809 (build 10.0.17763.0). Improper synchronization during concurrent execution using shared resources can be exploited by an authorized local attacker to elevate privileges. The vulnerability has been assigned CVE-2026-27927 and has a CVSS v3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as detailed in their security update guide.
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, allowing the attacker to execute code with higher privileges, potentially impacting system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided by Microsoft for Windows 10 Version 1809 (build 10.0.17763.0) as detailed in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27927. Applying this patch will remediate the race condition vulnerability and prevent privilege escalation via this vector.
CVE-2026-27927: 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 Projected File System 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 the Windows Projected File System on Windows 10 Version 1809 (build 10.0.17763.0). Improper synchronization during concurrent execution using shared resources can be exploited by an authorized local attacker to elevate privileges. The vulnerability has been assigned CVE-2026-27927 and has a CVSS v3.1 base score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability as detailed in their security update guide.
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, allowing the attacker to execute code with higher privileges, potentially impacting system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. It is strongly recommended to apply the security update provided by Microsoft for Windows 10 Version 1809 (build 10.0.17763.0) as detailed in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27927. Applying this patch will remediate the race condition vulnerability and prevent privilege escalation via this vector.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-24T21:35:49.688Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27927","vendor":"Microsoft"}]
Threat ID: 69de7a2482d89c981fd6ba02
Added to database: 04/14/2026, 17:32:20 UTC
Last enriched: 06/19/2026, 17:03:30 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 140
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