CVE-2026-32087

Received Received - Intake

Heap-Based Buffer Overflow in fdwsd.dll Enables Local Privilege Escalation

Publication date: 2026-04-14

Last updated on: 2026-04-21

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Function Discovery Service (fdwsd.dll) allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-14

Last Modified

2026-04-21

Generated

2026-07-06

AI Q&A

2026-04-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-32087

EUVD

EUVD-2026-22522

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

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is a heap-based buffer overflow in the Function Discovery Service (fdwsd.dll). It allows an authorized attacker to elevate their privileges locally on the affected system.

Compliance Impact

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

Consequently, this could impact compliance with common standards and regulations like GDPR and HIPAA, which require strict controls over access to sensitive personal and health information to prevent data breaches and unauthorized data manipulation.

Mitigation Strategies

This vulnerability is a heap-based buffer overflow in the Function Discovery Service (fdwsd.dll) that allows an authorized attacker to elevate privileges locally.

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

Impact Analysis

The vulnerability can lead to an elevation of privilege, meaning an attacker with some level of access could gain higher-level permissions on the system, potentially allowing them to perform unauthorized actions.

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