CVE-2026-32086
Race Condition in fdwsd.dll Enables Local Privilege Escalation
Publication date: 2026-04-14
Last updated on: 2026-04-21
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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.
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.