CVE-2026-20934: 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 SMB Server allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the Windows SMB Server on Windows 10 Version 1607 (build 10.0.14393.0). Due to improper synchronization when accessing shared resources concurrently, an authorized attacker can exploit this flaw remotely over the network to elevate their privileges. The CVSS 3.1 vector indicates network attack vector, high attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability is officially published and a patch is available.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges remotely via the SMB Server, potentially gaining higher-level access than intended. This can lead to full compromise of the affected system's confidentiality, integrity, and availability.
Mitigation Recommendations
An official patch is available for this vulnerability. It is recommended to apply the provided security update from Microsoft to remediate the issue. Since this is not a cloud service, system administrators should ensure affected Windows 10 Version 1607 systems are updated promptly. No additional mitigation guidance is provided or required beyond applying the patch.
CVE-2026-20934: 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 SMB Server allows an authorized attacker to elevate privileges over a network.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition (CWE-362) in the Windows SMB Server on Windows 10 Version 1607 (build 10.0.14393.0). Due to improper synchronization when accessing shared resources concurrently, an authorized attacker can exploit this flaw remotely over the network to elevate their privileges. The CVSS 3.1 vector indicates network attack vector, high attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability is officially published and a patch is available.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges remotely via the SMB Server, potentially gaining higher-level access than intended. This can lead to full compromise of the affected system's confidentiality, integrity, and availability.
Mitigation Recommendations
An official patch is available for this vulnerability. It is recommended to apply the provided security update from Microsoft to remediate the issue. Since this is not a cloud service, system administrators should ensure affected Windows 10 Version 1607 systems are updated promptly. No additional mitigation guidance is provided or required beyond applying the patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.337Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae4a60475309f9ae1f3
Added to database: 1/13/2026, 6:11:48 PM
Last enriched: 4/3/2026, 12:50:22 PM
Last updated: 5/9/2026, 11:48:47 AM
Views: 124
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