CVE-2026-50389 in Windows
Summary
by MITRE • 07/14/2026
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical information disclosure flaw within the Windows File Explorer component that enables authenticated attackers to access sensitive data that should remain protected from unauthorized access. The issue stems from insufficient access controls and privilege enforcement mechanisms within the file explorer interface, allowing malicious users who have already established system access to potentially extract confidential information through improper data exposure channels.
The technical implementation of this vulnerability typically involves a failure in the security model that governs how File Explorer handles file and directory permissions, metadata retrieval, or system resource access. Attackers can exploit this weakness by leveraging their existing authenticated session to query system resources that should be restricted based on user privileges or security contexts. This often manifests through improper handling of file system objects where sensitive attributes or associated data are returned without adequate authorization checks.
From an operational perspective, this vulnerability poses significant risks to enterprise environments where Windows File Explorer serves as a primary interface for users to interact with local and networked file systems. The impact extends beyond simple information leakage to potentially expose system configurations, user credentials stored in file attributes, application data, or system artifacts that could facilitate further exploitation. Organizations may experience data breaches, compliance violations, or insider threat complications when this vulnerability is successfully exploited.
The flaw aligns with common weakness enumerations such as CWE-200, which addresses information exposure, and CWE-732, concerning improper privilege management. Additionally, this vulnerability maps to ATT&CK technique T1083, Information Discovery, where adversaries seek to gather information about the system environment. The attack surface is particularly concerning in environments with shared or multi-user systems where proper segregation of duties may not be adequately enforced.
Mitigation strategies should include implementing comprehensive access control policies, applying security patches promptly, and conducting regular security assessments of file system permissions. Organizations should consider deploying additional monitoring controls to detect unusual information disclosure patterns and implement principle of least privilege configurations for File Explorer usage. Network segmentation and user account management controls can help reduce the attack surface where such vulnerabilities might be exploited. Regular security training for users regarding safe file handling practices and awareness of potential information leakage scenarios remains essential in reducing exploitation risks associated with this class of vulnerability.