CVE-2026-20926: 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 (CVE-2026-20926) involves a race condition (CWE-362) in the Windows SMB Server on Windows 10 Version 1607 (build 10.0.14393.0). The flaw arises from improper synchronization when multiple processes concurrently access a shared resource, enabling an authorized attacker to elevate privileges remotely over the network. The CVSS v3.1 base score is 7.5, reflecting high impact on confidentiality, integrity, and availability. The attack complexity is high, requiring low privileges and no user interaction. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges remotely via the SMB Server, potentially gaining higher system privileges and control. This can lead to full compromise of the affected system's confidentiality, integrity, and availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A patch is available from Microsoft to fix this vulnerability. It is recommended to apply the official update for Windows 10 Version 1607 (build 10.0.14393.0) as soon as possible to remediate the race condition in the SMB Server. No additional mitigations are specified.
CVE-2026-20926: 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 (CVE-2026-20926) involves a race condition (CWE-362) in the Windows SMB Server on Windows 10 Version 1607 (build 10.0.14393.0). The flaw arises from improper synchronization when multiple processes concurrently access a shared resource, enabling an authorized attacker to elevate privileges remotely over the network. The CVSS v3.1 base score is 7.5, reflecting high impact on confidentiality, integrity, and availability. The attack complexity is high, requiring low privileges and no user interaction. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation allows an authorized attacker to elevate privileges remotely via the SMB Server, potentially gaining higher system privileges and control. This can lead to full compromise of the affected system's confidentiality, integrity, and availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A patch is available from Microsoft to fix this vulnerability. It is recommended to apply the official update for Windows 10 Version 1607 (build 10.0.14393.0) as soon as possible to remediate the race condition in the SMB Server. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.336Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae3a60475309f9ae1d2
Added to database: 1/13/2026, 6:11:47 PM
Last enriched: 4/3/2026, 12:49:44 PM
Last updated: 5/9/2026, 2:12:56 AM
Views: 101
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