CVE-2025-4394 in MyCareLink Patient Monitor 24950
Summary
by MITRE • 07/24/2025
Medtronic MyCareLink Patient Monitor uses an unencrypted filesystem on internal storage, which allows an attacker with physical access to read and modify files.
This issue affects MyCareLink Patient Monitor models 24950 and 24952: before June 25, 2025
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Analysis
by VulDB Data Team • 03/27/2026
The vulnerability identified as CVE-2025-4394 represents a critical security flaw in Medtronic MyCareLink Patient Monitor devices, specifically affecting models 24950 and 24952. This weakness stems from the device's implementation of an unencrypted filesystem on its internal storage, creating a significant attack surface for adversaries who gain physical access to the equipment. The absence of encryption at rest fundamentally undermines the confidentiality and integrity of data stored on these medical devices, which are designed to handle sensitive patient information and critical health monitoring data.
The technical flaw manifests in the device's failure to implement proper data encryption mechanisms for its internal storage system. This design oversight means that any individual with physical possession of the device can directly access the filesystem and manipulate stored data without authentication requirements. The vulnerability falls under CWE-311, which specifically addresses the absence of encryption of sensitive data, and represents a direct violation of security best practices for medical device security. The lack of encryption creates multiple attack vectors including data exfiltration, malicious data modification, and potential compromise of patient health information integrity.
The operational impact of this vulnerability extends beyond simple data exposure, as it directly affects patient safety and medical device integrity. Attackers with physical access could potentially modify critical patient monitoring data, alter device configurations, or inject malicious code into the system. This threat landscape aligns with ATT&CK technique T1490, which covers data destruction and manipulation, and T1070, which addresses indicator removal on host systems. The compromised device could provide attackers with access to sensitive patient health records, device operational parameters, and potentially manipulate real-time patient monitoring data, creating serious risks for patient care and medical device reliability.
Organizations and healthcare providers must implement immediate mitigations including enhanced physical security controls, regular device inventory management, and mandatory security assessments for all connected medical devices. The vulnerability underscores the critical importance of secure by design principles in medical device development, particularly for devices handling sensitive patient data. Device manufacturers should prioritize implementing robust encryption mechanisms, regular security updates, and comprehensive risk assessments to prevent similar vulnerabilities in future device iterations. Additionally, healthcare facilities must establish strict protocols for device handling, secure storage, and access controls to minimize the risk of unauthorized physical access to critical medical equipment.