EUVD-2026-44059
GHSA-5g28-xq6m-rq2f
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local attack vector and low-privilege requirement confirmed by description; confidentiality-only impact with no integrity or availability effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
AnalysisAI
Windows File Explorer exposes sensitive information to low-privileged local authenticated users across a wide range of Windows 10, Windows 11, and Windows Server versions. Classified under CWE-200, the flaw enables an attacker already present on a system with standard user rights to access data they should not be permitted to view - no elevation of privilege or remote access is required. No public exploit code has been identified and CISA SSVC confirms no active exploitation, keeping real-world urgency moderate despite the broad affected product surface.
Technical ContextAI
The vulnerability resides in Windows File Explorer (the Windows shell file manager), a core OS component present across all major Windows releases. CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) indicates the root cause is an access control deficiency - the component fails to properly restrict which data a low-privileged process or user can observe or enumerate. The affected CPEs span cpe:2.3:a:microsoft:windows_10_version_1607 through cpe:2.3:a:microsoft:windows_server_2019 and per EUVD extend to Windows Server 2022, 2025, and Windows 11 versions 24H2, 25H2, and 26H1. The attack surface is entirely local (AV:L), meaning the flaw is exploitable only by a user or process with an established session on the target machine.
RemediationAI
The primary remediation is to apply the vendor-released cumulative update that brings each affected build to the fixed versions identified in EUVD data. For Windows 10 22H2, update to build 10.0.19045.7548 or later; for Windows 11 24H2, update to 10.0.26100.8875 or later; for Windows Server 2025, update to 10.0.26100.33158 or later (full version mapping is detailed in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50389). Where patching is temporarily delayed, defenders should enforce the principle of least privilege - ensure that low-privileged user accounts do not have access to directories or paths containing sensitive files that File Explorer might expose. Restricting interactive logon rights on sensitive servers (especially Server Core deployments) reduces the local attack surface, though this may impact legitimate administrative workflows. Monitoring for unusual file enumeration activity by low-privileged accounts via Windows Event Logs can serve as a compensating detective control.
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Same weakness CWE-200 – Information Exposure
View allSame technique Information Disclosure
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External POC / Exploit Code
Leaving vuln.today