Untrusted Pointer Dereference in Windows USB Hub Driver

Executive Summary

CVE-2026-50479 is a vulnerability in the Windows USB Hub Driver. It involves an untrusted pointer dereference, which means the driver incorrectly handles a pointer that can be manipulated by an attacker. This flaw allows an authorized attacker with local access to the system to elevate their privileges.

An untrusted pointer dereference occurs when a program uses a pointer that has not been properly validated or sanitized, leading to potential exploitation. In this case, the attacker can exploit this flaw to gain higher-level permissions on the affected system.

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Impact Analysis

This vulnerability can impact you in several ways if exploited by an attacker:

• An attacker with local access to your system could elevate their privileges, gaining administrative or system-level control over the affected machine.
• With elevated privileges, the attacker could install malicious software, modify or delete sensitive data, or create new user accounts with full access.
• The vulnerability could be used as part of a larger attack chain to compromise additional systems or networks connected to the affected machine.

Since the vulnerability requires local access, the risk is higher in environments where multiple users share a system or where physical access to machines is not strictly controlled.

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Compliance Impact

This vulnerability could affect compliance with common standards and regulations in the following ways:

• GDPR (General Data Protection Regulation): If the vulnerability is exploited to gain unauthorized access to personal data, it could lead to a data breach. Organizations must report such breaches within 72 hours under GDPR, and failure to protect personal data could result in significant fines.
• HIPAA (Health Insurance Portability and Accountability Act): In healthcare environments, exploitation of this vulnerability could lead to unauthorized access to protected health information (PHI). This would constitute a breach under HIPAA, requiring notification and potentially resulting in penalties for non-compliance.
• Other standards like ISO 27001 or NIST frameworks require organizations to maintain secure systems and protect against unauthorized access. Exploitation of this vulnerability could indicate a failure to implement adequate security controls, leading to non-compliance.

Organizations should assess the risk posed by this vulnerability and apply patches or mitigations promptly to avoid potential compliance violations.

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Mitigation Strategies

Apply the security update provided by Microsoft to address CVE-2026-50479. The update can be found on the Microsoft Update Guide for this vulnerability.

• Ensure all systems running the affected Windows USB Hub Driver are updated to the latest patched version.
• Restrict local access to authorized users only, as the vulnerability requires local privileges to exploit.

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