CVE-2026-42991: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1809
CVE-2026-42991 is a race condition vulnerability in Windows Push Notifications on Microsoft Windows 10 Version 1809. It allows a locally authorized attacker to elevate privileges due to improper synchronization when accessing shared resources concurrently. The vulnerability has a high severity score of 7. 8 and has an official patch available from Microsoft.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the Windows Push Notifications component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). Improper synchronization during concurrent execution of shared resources enables an authorized local attacker to elevate privileges. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected system, potentially gaining higher-level access and control. The vulnerability impacts confidentiality, integrity, and availability of the system.
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-2026-42991 to remediate this vulnerability.
CVE-2026-42991: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1809
Description
CVE-2026-42991 is a race condition vulnerability in Windows Push Notifications on Microsoft Windows 10 Version 1809. It allows a locally authorized attacker to elevate privileges due to improper synchronization when accessing shared resources concurrently. The vulnerability has a high severity score of 7. 8 and has an official patch available from Microsoft.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition (CWE-362) in the Windows Push Notifications component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). Improper synchronization during concurrent execution of shared resources enables an authorized local attacker to elevate privileges. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected system, potentially gaining higher-level access and control. The vulnerability impacts confidentiality, integrity, and availability of the system.
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-2026-42991 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T23:43:50.746Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42991","vendor":"Microsoft"}]
Threat ID: 6a284ccb8dd33fbd85664960
Added to database: 6/9/2026, 5:26:35 PM
Last enriched: 6/9/2026, 10:55:52 PM
Last updated: 6/10/2026, 5:07:06 AM
Views: 2
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