CVE-2026-50442 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 restricted to authorized users only. The issue stems from improper access controls and privilege escalation mechanisms within the file system navigation interface, allowing malicious actors who have already established user-level access to bypass normal security boundaries and retrieve confidential information. The vulnerability operates at the operating system level where File Explorer fails to properly enforce mandatory access controls that should prevent unauthorized data exposure.
The technical implementation of this flaw involves weaknesses in the Windows kernel-mode drivers and user-mode applications that handle file metadata and directory traversal operations. When users navigate through file systems using File Explorer, the application does not adequately validate access permissions for certain file attributes or system-protected directories. This creates an opportunity for attackers to exploit path traversal techniques combined with privilege escalation methods to access files that contain sensitive information such as configuration settings, user credentials, or system logs. The vulnerability typically manifests when the application processes file requests without proper authorization checks, allowing data disclosure through direct memory access or improper file handle management.
The operational impact of this vulnerability extends beyond simple information disclosure, potentially enabling more sophisticated attacks including credential theft, system reconnaissance, and lateral movement within compromised networks. Attackers can leverage this weakness to gather intelligence about system configurations, identify vulnerable services, and map network structures that would normally be protected from casual access. The localized nature of the vulnerability means that while it primarily affects Windows environments, it can serve as a stepping stone for broader attacks when combined with other exploitation techniques or when used in conjunction with additional vulnerabilities within the same ecosystem. This weakness directly violates fundamental security principles outlined in the principle of least privilege and mandatory access controls.
Mitigation strategies should focus on implementing comprehensive patch management protocols that address the underlying operating system flaws, combined with network segmentation to limit lateral movement capabilities. System administrators should enforce strict access control policies and regularly audit file permissions to prevent unauthorized information access. The implementation of security monitoring solutions that detect anomalous File Explorer behavior or unusual data access patterns can help identify exploitation attempts. Organizations should also consider deploying application whitelisting solutions to restrict File Explorer functionality and reduce attack surface. This vulnerability aligns with several CWE categories including CWE-200 Information Exposure, CWE-264 Permissions, Privileges, and Access Controls, and may relate to ATT&CK techniques such as T1083 File and Directory Discovery and T1074 Data Staged for Exfiltration, highlighting the need for layered defensive measures across multiple security domains.