CVE-2026-42900: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
CVE-2026-42900 is a race condition vulnerability in the Windows App Store component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). It allows an unauthorized attacker to elevate privileges over a network due to improper synchronization when concurrently accessing shared resources. The vulnerability has a high severity with a CVSS score of 8.1. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability involves a concurrent execution issue (race condition) in the Windows App Store on Windows 10 Version 1607. Improper synchronization of shared resources can be exploited by an attacker over a network to elevate privileges. The CVSS vector indicates the attack requires high attack complexity, no privileges, and no user interaction, with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
An attacker who successfully exploits this race condition can elevate their privileges on the affected system remotely, potentially gaining high-level access. This can lead to full compromise of confidentiality, integrity, and availability of the affected 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-2026-42900 to remediate this vulnerability.
CVE-2026-42900: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
Description
CVE-2026-42900 is a race condition vulnerability in the Windows App Store component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). It allows an unauthorized attacker to elevate privileges over a network due to improper synchronization when concurrently accessing shared resources. The vulnerability has a high severity with a CVSS score of 8.1. An official fix is available from Microsoft.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a concurrent execution issue (race condition) in the Windows App Store on Windows 10 Version 1607. Improper synchronization of shared resources can be exploited by an attacker over a network to elevate privileges. The CVSS vector indicates the attack requires high attack complexity, no privileges, and no user interaction, with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
An attacker who successfully exploits this race condition can elevate their privileges on the affected system remotely, potentially gaining high-level access. This can lead to full compromise of confidentiality, integrity, and availability of the affected 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-2026-42900 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.967Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42900","vendor":"Microsoft"}]
Threat ID: 6a566f6768715ace43e6b308
Added to database: 07/14/2026, 17:18:31 UTC
Last enriched: 07/15/2026, 02:04:08 UTC
Last updated: 07/15/2026, 02:04:08 UTC
Views: 2
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