CVE-2026-83864
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Improper Access Control in Windows NTFS Leads to Local Information Disclosure

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Improper access control in Windows NTFS allows an authorized attacker to disclose information locally.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-14
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-83864
EUVD
EUVD-2026-99393

Affected Vendors & Products

Showing 17 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

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Executive Summary

This vulnerability is an improper access control flaw in Windows NTFS that allows an authorized local attacker to disclose information. It does not require elevated privileges beyond basic user access.

Impact Analysis

An attacker with local access could exploit this to read sensitive files or data they should not have permission to view. This could lead to unauthorized information disclosure on affected Windows systems.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the NTFS improper access control vulnerability. Monitor Microsoft's security advisories for updates and ensure all affected systems are updated promptly.

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