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Privacy Statement Third-Party Cookies AcceptRejectManage cookies MSRC  Customer Guidance  Security Update Guide  Vulnerabilities  CVE-2026-62887 Windows NTFS Information Disclosure Vulnerability New On this page  CVE-2026-62887  Subscribe RSS PowerShell  API  CSAF Security Vulnerability Released: Aug 11, 2026 Assigning CNA Microsoft CVE.org link CVE-2026-62887  Impact Information Disclosure Max Severity Important Weakness CWE-125: Out-of-bounds Read CVSS Source Microsoft Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C Metrics CVSS:3.1 5.5 / 4.8  Base score metrics: 5.5 / Temporal score metrics: 4.8  Expand all  Collapse all Metric Value   Base score metrics(8) Attack Vector Local Attack Complexity Low Privileges Required Low User Interaction None Scope Unchanged Confidentiality High Integrity None Availability None   Temporal score metrics(3) Exploit Code Maturity Unproven Remediation Level Official Fix Report Confidence Confirmed Please see Common Vulnerability Scoring System for more information on the definition of these metrics. Executive Summary Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally. Exploitability The following table provides an exploitability assessment for this vulnerability at the time of original publication. Publicly disclosed No Exploited No Exploitability assessment Exploitation Unlikely FAQ What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is unauthorized file system access - reading from the file system. Acknowledgements Thanatos Tian (HKPolyU) & wgg & @2st__ with Diffract Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information. Security Updates To determine the support lifecycle for your software, see the Microsoft Support Lifecycle. Release date Descending  Edit columns  Download  Filters  Product Family  Max Severity  Impact  Platform   Clear Release date  Product Platform Impact Max Severity Article Download Build Number Assigning CNA Title: Release date, Content: Aug 11, 2026 Windows 10 Version 21H2 for x64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 10 Version 21H2 for x64-based Systems, Content:, 1 link 5120249  Title: Download Security Update for Windows 10 Version 21H2 for x64-based Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.19044.7663 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 10 Version 21H2 for ARM64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 10 Version 21H2 for ARM64-based Systems, Content:, 1 link 5120249  Title: Download Security Update for Windows 10 Version 21H2 for ARM64-based Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.19044.7663 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 10 Version 21H2 for 32-bit Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 10 Version 21H2 for 32-bit Systems, Content:, 1 link 5120249  Title: Download Security Update for Windows 10 Version 21H2 for 32-bit Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.19044.7663 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows Server 2022 (Server Core installation) - Information Disclosure Important Title: Knowledge Base Articles for Windows Server 2022 (Server Core installation), Content:, 2 links 5120242  5120229  Title: Download Security Update for Windows Server 2022 (Server Core installation), Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.20348.5499 10.0.20348.5440 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows Server 2022 - Information Disclosure Important Title: Knowledge Base Articles for Windows Server 2022, Content:, 2 links 5120242  5120229  Title: Download Security Update for Windows Server 2022, Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.20348.5499 10.0.20348.5440 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows Server 2019 (Server Core installation) - Information Disclosure Important Title: Knowledge Base Articles for Windows Server 2019 (Server Core installation), Content:, 1 link 5120238  Title: Download Security Update for Windows Server 2019 (Server Core installation), Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.17763.9115 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows Server 2019 - Information Disclosure Important Title: Knowledge Base Articles for Windows Server 2019, Content:, 1 link 5120238  Title: Download Security Update for Windows Server 2019, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.17763.9115 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 26H1 for ARM64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 26H1 for ARM64-based Systems, Content:, 1 link 5121000  Title: Download Security Update for Windows 11 Version 26H1 for ARM64-based Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.28000.2704 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 version 26H1 for x64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 version 26H1 for x64-based Systems, Content:, 1 link 5121000  Title: Download Security Update for Windows 11 version 26H1 for x64-based Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.28000.2704 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows Server 2025 - Information Disclosure Important Title: Knowledge Base Articles for Windows Server 2025, Content:, 2 links 5120233  5120228  Title: Download Security Update for Windows Server 2025, Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.26100.33296 10.0.26100.33222 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 24H2 for x64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 24H2 for x64-based Systems, Content:, 2 links 5121003  5120994  Title: Download Security Update for Windows 11 Version 24H2 for x64-based Systems, Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.26100.9168 10.0.26000.9106 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 24H2 for ARM64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 24H2 for ARM64-based Systems, Content:, 2 links 5121003  5120994  Title: Download Security Update for Windows 11 Version 24H2 for ARM64-based Systems, Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.26100.9168 10.0.26100.9106 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 23H2 for x64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 23H2 for x64-based Systems, Content:, 1 link 5120240  Title: Download Security Update for Windows 11 Version 23H2 for x64-based Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.22631.7517 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 23H2 for ARM64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 23H2 for ARM64-based Systems, Content:, 1 link 5120240  Title: Download Security Update for Windows 11 Version 23H2 for ARM64-based Systems, Content:, 1 link Security Update  Title: Build numbers, Content: 10.0.22631.7517 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 25H2 for x64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 25H2 for x64-based Systems, Content:, 2 links 5121003  5120994  Title: Download Security Update for Windows 11 Version 25H2 for x64-based Systems, Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.26200.9168 10.0.26100.9106 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows 11 Version 25H2 for ARM64-based Systems - Information Disclosure Important Title: Knowledge Base Articles for Windows 11 Version 25H2 for ARM64-based Systems, Content:, 2 links 5121003  5120994  Title: Download Security Update for Windows 11 Version 25H2 for ARM64-based Systems, Content:, 2 links Security Update  Security Hotpatch Update  Title: Build numbers, Content: 10.0.26200.9168 10.0.26100.9106 Title: Assigning CNA, Content: Microsoft Title: Release date, Content: Aug 11, 2026 Windows Server 2025 (Server Core installation) - Information Disclosure Important Title: Knowledge Base Articles for Windows Server 2025 (Ser