CVE-2026-32086
Received Received - Intake
Race Condition in fdwsd.dll Enables Local Privilege Escalation

Publication date: 2026-04-14

Last updated on: 2026-04-21

Assigner: Microsoft Corporation

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.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-21
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-14
NVD
CVE-2026-32086
EUVD
EUVD-2026-22520
Affected Vendors & Products
Showing 25 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_10_1607 to 10.0.14393.9060 (exc)
microsoft windows_10_1607 to 10.0.14393.9060 (exc)
microsoft windows_10_1809 to 10.0.17763.8644 (exc)
microsoft windows_10_1809 to 10.0.17763.8644 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_11_23h2 to 10.0.22631.6936 (exc)
microsoft windows_11_23h2 to 10.0.22631.6936 (exc)
microsoft windows_11_24h2 to 10.0.26100.8246 (exc)
microsoft windows_11_24h2 to 10.0.26100.8246 (exc)
microsoft windows_11_25h2 to 10.0.26200.8246 (exc)
microsoft windows_11_25h2 to 10.0.26200.8246 (exc)
microsoft windows_11_26h1 to 10.0.28000.1836 (exc)
microsoft windows_11_26h1 to 10.0.28000.1836 (exc)
microsoft windows_server_2016 to 10.0.14393.9060 (exc)
microsoft windows_server_2019 to 10.0.17763.8644 (exc)
microsoft windows_server_2022 to 10.0.20348.5020 (exc)
microsoft windows_server_2022_23h2 to 10.0.25398.2274 (exc)
microsoft windows_server_2025 to 10.0.26100.32690 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Attack-Flow Graph
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Executive Summary

This vulnerability is a race condition in the Function Discovery Service (fdwsd.dll) caused by concurrent execution using a shared resource without proper synchronization. It allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

An attacker who already has some level of local access can exploit this vulnerability to gain higher privileges. This means they could perform actions that normally require elevated permissions, potentially compromising system integrity, confidentiality, and availability.

Compliance Impact

This vulnerability allows an authorized attacker to elevate privileges locally through a race condition in the Function Discovery Service. Such unauthorized privilege escalation can lead to unauthorized access or modification of sensitive data.

Because of the potential for unauthorized access and data compromise, this vulnerability could negatively impact compliance with standards and regulations like GDPR and HIPAA, which require strict controls on data access and protection.

Mitigation Strategies

This vulnerability involves a race condition in the Function Discovery Service (fdwsd.dll) that allows local privilege escalation.

To mitigate this vulnerability, it is recommended to apply the security updates provided by Microsoft as soon as they become available.

Since the vulnerability requires local authorized access, limiting user privileges and monitoring for unusual local activity can help reduce risk until patches are applied.

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