CVE-2026-59128
Received Received - Intake

Out-of-bounds Read in Windows Encrypting File System

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Microsoft Corporation

Description
Out-of-bounds read in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information locally.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-59128
EUVD
EUVD-2026-56309

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_encrypting_file_system *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an out-of-bounds read flaw in Windows Encrypting File System (EFS). It allows an authorized attacker with local access to read beyond the intended memory boundaries, potentially exposing sensitive information stored in encrypted files.

Impact Analysis

An attacker could exploit this to access confidential data on your system if they have local access. This includes sensitive files encrypted by EFS, leading to potential data breaches or unauthorized information disclosure.

Compliance Impact

This vulnerability could lead to non-compliance with data protection regulations like GDPR or HIPAA if it results in unauthorized access to personal or health information. Organizations may face penalties for failing to protect sensitive data adequately.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the EFS vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

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