CVE-2025-50156 in Windows
Summary
by MITRE • 08/12/2025
Use of uninitialized resource in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to disclose information over a network.
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Analysis
by VulDB Data Team • 11/22/2025
The vulnerability identified as CVE-2025-50156 represents a critical information disclosure flaw within the Windows Routing and Remote Access Service component that operates under the Common Weakness Enumeration framework as CWE-457. This weakness specifically involves the use of uninitialized resources, where the RRAS service fails to properly initialize certain memory structures or variables before utilizing them in network communication contexts. The vulnerability exists within the Windows operating system's core networking infrastructure that manages routing protocols and remote access capabilities, particularly affecting systems configured with RRAS functionality.
The technical implementation of this vulnerability stems from improper resource management within the RRAS service daemon that handles network traffic routing and remote access connections. When authorized users interact with the RRAS service through legitimate network connections, the service may attempt to access memory locations that have not been properly initialized with valid data values. This uninitialized memory state can contain residual data from previous operations, potentially exposing sensitive information such as system credentials, network configuration details, or internal service states that should remain confidential. The flaw manifests during normal operational procedures when the service processes network requests, making it particularly dangerous as it operates within legitimate administrative contexts.
Operational impact of CVE-2025-50156 extends beyond simple information disclosure, creating potential pathways for privilege escalation and further exploitation attempts within network environments. An authorized attacker with sufficient access rights can leverage this vulnerability to extract sensitive data that may reveal network topology, authentication mechanisms, or service configurations that could aid in subsequent attacks. The vulnerability's network-based nature means that exploitation can occur remotely without requiring physical access to the target system, making it particularly concerning for enterprise environments where RRAS services are commonly deployed for remote access and network routing functions. This weakness directly violates the principle of least privilege and can undermine the security posture of organizations relying on Windows networking services for critical infrastructure operations.
Mitigation strategies for CVE-2025-50156 should prioritize immediate patch deployment from Microsoft as the primary defense mechanism, alongside network segmentation and access control measures to limit potential exploitation vectors. Organizations should implement monitoring solutions to detect anomalous network traffic patterns that may indicate exploitation attempts, particularly focusing on RRAS service communications and unusual data disclosure activities. The vulnerability aligns with ATT&CK technique T1082 for system information discovery and T1566 for credential access through network service exploitation. Security teams should conduct comprehensive vulnerability assessments targeting RRAS configurations and implement network access control lists to restrict unnecessary access to routing services, while also ensuring proper logging and audit controls are enabled to detect unauthorized information disclosure attempts. Additionally, regular security updates and vulnerability scanning should be integrated into operational procedures to prevent similar uninitialized resource issues from compromising system integrity.