CVE-2026-42836: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
CVE-2026-42836 is a race condition vulnerability in the Function Discovery Service (fdwsd. dll) of Microsoft Windows 10 Version 1607. It allows an authorized local attacker to elevate privileges due to improper synchronization when concurrently accessing shared resources. The vulnerability has a high severity rating and a CVSS score of 7. An official fix is available from Microsoft.
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 using shared resources allows a local attacker with some privileges to escalate their privileges further. The issue is addressed by an official patch provided by Microsoft as per their security advisory.
Potential Impact
An authorized local attacker can exploit this race condition to elevate privileges on the affected system. This could lead to full system compromise, including confidentiality, integrity, and availability impacts 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 referenced in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42836 to remediate this vulnerability.
CVE-2026-42836: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in Microsoft Windows 10 Version 1607
Description
CVE-2026-42836 is a race condition vulnerability in the Function Discovery Service (fdwsd. dll) of Microsoft Windows 10 Version 1607. It allows an authorized local attacker to elevate privileges due to improper synchronization when concurrently accessing shared resources. The vulnerability has a high severity rating and a CVSS score of 7. An official fix is available from Microsoft.
CVSS v3.1
Score 7.0high
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 using shared resources allows a local attacker with some privileges to escalate their privileges further. The issue is addressed by an official patch provided by Microsoft as per their security advisory.
Potential Impact
An authorized local attacker can exploit this race condition to elevate privileges on the affected system. This could lead to full system compromise, including confidentiality, integrity, and availability impacts 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 referenced in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42836 to remediate this 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: 6/9/2026, 5:26:24 PM
Last enriched: 6/9/2026, 11:12:32 PM
Last updated: 6/10/2026, 5:05:58 AM
Views: 2
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