CVE-2026-42836: 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 Function Discovery Service (fdwsd.dll) allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a race condition (CWE-362) in the Function Discovery Service component of Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization during concurrent execution of shared resources can be exploited by an authorized local attacker to elevate privileges. The issue is tracked as CVE-2026-42836 and has been assigned a CVSS v3.1 base score of 7.0, indicating high severity. Microsoft has released an official patch to address this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected system. This could lead to full system compromise depending on the privileges gained. The vulnerability affects confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42836. Applying this patch will remediate the vulnerability.
CVE-2026-42836: 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 Function Discovery Service (fdwsd.dll) allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition (CWE-362) in the Function Discovery Service component of Windows 10 Version 1607 (build 10.0.14393.0). Improper synchronization during concurrent execution of shared resources can be exploited by an authorized local attacker to elevate privileges. The issue is tracked as CVE-2026-42836 and has been assigned a CVSS v3.1 base score of 7.0, indicating high severity. Microsoft has released an official patch to address this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected system. This could lead to full system compromise depending on the privileges gained. The vulnerability affects confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42836. Applying this patch will remediate the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T14:51:12.704Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42836","vendor":"Microsoft"}]
Threat ID: 6a284cc08dd33fbd856646d3
Added to database: 06/09/2026, 17:26:24 UTC
Last enriched: 07/29/2026, 21:46:34 UTC
Last updated: 07/31/2026, 19:30:13 UTC
Views: 58
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