CVE-2026-42978: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1809
CVE-2026-42978 is a race condition vulnerability in Windows Push Notifications on Windows 10 Version 1809. It allows an authorized local attacker to elevate privileges due to improper synchronization when accessing shared resources concurrently. The vulnerability has a high severity with a CVSS score of 7. 8. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42978) 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 allows a local attacker with some privileges to escalate their privileges further. The issue is recognized and addressed by Microsoft with an official patch. No known exploits are reported in the wild at this time.
Potential Impact
Successful exploitation permits an authorized local attacker to elevate privileges, potentially gaining higher-level access on the affected system. This can lead to full compromise of the affected Windows 10 Version 1809 system if exploited.
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-2026-42978 to remediate this vulnerability.
CVE-2026-42978: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1809
Description
CVE-2026-42978 is a race condition vulnerability in Windows Push Notifications on Windows 10 Version 1809. It allows an authorized local attacker to elevate privileges due to improper synchronization when accessing shared resources concurrently. The vulnerability has a high severity with a CVSS score of 7. 8. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42978) 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 allows a local attacker with some privileges to escalate their privileges further. The issue is recognized and addressed by Microsoft with an official patch. No known exploits are reported in the wild at this time.
Potential Impact
Successful exploitation permits an authorized local attacker to elevate privileges, potentially gaining higher-level access on the affected system. This can lead to full compromise of the affected Windows 10 Version 1809 system if exploited.
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-2026-42978 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T23:43:50.745Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42978","vendor":"Microsoft"}]
Threat ID: 6a284cc88dd33fbd856648dc
Added to database: 6/9/2026, 5:26:32 PM
Last enriched: 6/9/2026, 10:56:41 PM
Last updated: 6/10/2026, 4:44:40 AM
Views: 2
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