CVE-2026-50430 in Windows
Summary
by MITRE • 07/14/2026
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications 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 privilege escalation vector within the Windows operating system that stems from improper access controls in the push notifications subsystem. The flaw allows an authenticated attacker with limited user privileges to exploit weak security boundaries that govern how sensitive information flows through the notification infrastructure. Such exposure occurs when the system fails to properly validate access permissions for notification-related data structures, enabling malicious actors to traverse security boundaries and obtain confidential information that should remain restricted to authorized processes.
The technical implementation of this vulnerability typically involves exploiting insufficient input validation within Windows Push Notification Service components that handle inter-process communication. Attackers can leverage this weakness by crafting specially formatted notification requests or manipulating existing notification handlers to access information that normally requires elevated privileges. This represents a classic case of insufficient authorization checks where the system does not adequately verify whether requesting processes have legitimate access rights to specific notification content or metadata. The vulnerability aligns with CWE-284 which addresses improper access control mechanisms, and specifically demonstrates how weak privilege separation in system services can enable unauthorized information disclosure.
The operational impact extends beyond simple information leakage as this vulnerability creates a persistent attack vector that can be exploited repeatedly by adversaries who gain initial user-level access through other means. Once exploited, attackers can obtain sensitive metadata about applications, user activities, or system configurations that may aid in further exploitation attempts. The local nature of the vulnerability means that attackers do not require network connectivity or remote access capabilities, making detection more challenging as the compromise occurs within the target system's trusted environment. This characteristic also places the vulnerability in alignment with ATT&CK technique T1074 which covers data staging through local system information gathering.
Mitigation strategies should focus on implementing comprehensive access control measures within the Windows notification subsystem and ensuring proper privilege separation between notification handlers and sensitive data repositories. System administrators should apply Microsoft security patches promptly and consider implementing additional monitoring for unusual notification service activity that may indicate exploitation attempts. The vulnerability underscores the importance of maintaining strict security boundaries even within trusted system components and demonstrates why comprehensive security testing of inter-process communication mechanisms is essential. Organizations should also implement regular security assessments focusing on notification service configurations and ensure that proper auditing controls are enabled to detect unauthorized access patterns within these critical system components.