EUVD-2026-22522
GHSA-49pj-8x2g-xv47
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionCVE.org
Heap-based buffer overflow in Function Discovery Service (fdwsd.dll) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in Microsoft Windows Function Discovery Service (fdwsd.dll) enables low-privileged authenticated local attackers to escalate privileges to SYSTEM across Windows 10, Windows 11, and Windows Server 2012-2025. Vendor-released patch available per Microsoft Security Response Center advisory. No public exploit identified at time of analysis, though the CVSS vector indicates local access with high attack complexity (AC:H), requiring authenticated low-privilege users (PR:L). A
Technical ContextAI
The vulnerability resides in the Function Discovery (FD) Service component (fdwsd.dll), a Windows system service responsible for discovering network devices and services through protocols like WS-Discovery, UPnP, and SSDP. CWE-122 identifies this as a heap-based buffer overflow, occurring when the service writes data beyond allocated heap memory boundaries during processing operations. Unlike stack-based overflows, heap corruption vulnerabilities typically require more sophisticated exploitation techniques due to non-deterministic memory layouts and heap metadata manipulation requirements, aligning with the CVSS AC:H (high complexity) rating. The Function Discovery Service runs with elevated privileges in the Windows service architecture, making successful exploitation a direct path to SYSTEM-level access. Affected CPE strings confirm impact spans Windows 10 (versions 1607 through 22H2), Windows 11 (22H3 through 26H1), and Windows Server platforms from 2012 through 2025, including Server Core installations that lack GUI management interfaces.
RemediationAI
Apply vendor-released security updates immediately through Windows Update, WSUS, or Microsoft Update Catalog. Microsoft has published patches addressing CVE-2026-32087 with specific fixed versions: Windows Server 2016 10.0.14393.9060 or later, Windows Server 2012 R2 6.3.9600.23132 or later, Windows Server 2012 6.2.9200.26026 or later, Windows 10 Version 1809 10.0.17763.8644 or later, Windows Server 2022 23H2 Edition 10.0.25398.2274 or later, Windows 10 Version 1607 10.0.14393.9060 or later, Windows 11 version 26H1 10.0.28000.1836 or later, Windows 10 Version 22H2 10.0.19045.7184 or later, Windows Server 2025 10.0.26100.32690 or later, Windows 10 Version 21H2 10.0.19044.7184 or later, Windows 11 Version 25H2 10.0.26200.8246 or later, Windows Server 2019 10.0.17763.8644 or later, Windows 11 Version 24H2 10.0.26100.32690 or later, Windows 11 Versions 23H2
More in Windows Server 2012
View allWindows MSHTML component contains a remote code execution vulnerability that allows attackers to craft malicious ActiveX
<p>A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged fi
Remote code execution in Microsoft Office 2007-2016 and Windows Vista through 10 allows attackers to execute arbitrary c
Windows MSDT (Microsoft Support Diagnostic Tool) allows remote code execution when called via the ms-msdt URL protocol f
The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows
The Windows VBScript engine contains a remote code execution vulnerability in object handling that allows full system co
Windows Print Spooler Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no auth
The Win32k kernel-mode driver in Windows Vista through Windows Server 2016 allows local privilege escalation, exploited
Windows Search Remote Code Execution Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely explo
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in
Active Directory Domain Services Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.5), this vulnerabilit
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today