CVE-2025-4393 in MyCareLink Patient Monitor 24950
Summary
by MITRE • 07/24/2025
Medtronic MyCareLink Patient Monitor has an internal service that deserializes data, which allows a local attacker to interact with the service by crafting a binary payload to crash the service or elevate privileges.
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-2025-4393 represents a critical deserialization flaw within the Medtronic MyCareLink Patient Monitor system, specifically impacting models 24950 and 24952. This issue resides in the internal service architecture that handles data processing, creating a significant attack surface for local adversaries who can exploit the system through crafted binary payloads. The vulnerability's classification aligns with CWE-502, which specifically addresses deserialization of untrusted data, a well-documented weakness that has been exploited in numerous high-profile security incidents across various domains including healthcare systems. The MyCareLink Patient Monitor serves as a critical component in patient data management, collecting and transmitting sensitive medical information from implanted devices to healthcare providers, making this vulnerability particularly concerning from a patient safety and data security perspective.
The technical exploitation of this vulnerability occurs through the manipulation of the internal service's deserialization mechanism, which processes binary data payloads without adequate validation or sanitization. When a local attacker crafts a malicious binary payload, the service's failure to properly validate input data allows for arbitrary code execution or system crash conditions. This deserialization flaw enables privilege escalation scenarios where an attacker can potentially elevate their access level within the system, moving from standard user privileges to administrative access. The service architecture appears to lack proper input validation controls and secure deserialization practices, creating a pathway for attackers to bypass normal access controls and execute malicious operations. The vulnerability's impact is amplified by the fact that it affects the system's core data processing functions, potentially compromising the integrity and availability of patient monitoring data.
The operational impact of CVE-2025-4393 extends beyond simple system crashes to encompass potential patient safety risks and data integrity concerns. Healthcare systems relying on these monitors face significant operational challenges including service disruption, data loss, and potential unauthorized access to sensitive patient information. The vulnerability's local attack vector means that only individuals with physical access to the device or network-level access within the local environment can exploit it, but this limitation does not diminish its severity given the critical nature of medical device security. The affected models represent a substantial portion of the deployed patient monitoring infrastructure, making the potential impact widespread across healthcare facilities. From an att&ck framework perspective, this vulnerability maps to techniques involving privilege escalation and execution of malicious code, with potential lateral movement opportunities if the attacker can establish persistence within the local network environment. The vulnerability also introduces risks of data manipulation and system compromise that could affect clinical decision-making processes and patient care delivery.
Mitigation strategies for CVE-2025-4393 should prioritize immediate system updates and patches from Medtronic, as well as implementation of network segmentation to limit local access to affected devices. Organizations should deploy network monitoring solutions to detect anomalous behavior patterns that might indicate exploitation attempts, particularly focusing on unusual deserialization activities or privilege escalation events. The implementation of secure coding practices and input validation controls should be enforced across all internal services, with regular security assessments of medical device environments. Access controls should be strictly enforced with minimal privilege principles applied to prevent unauthorized individuals from accessing the affected services. Additionally, organizations should develop incident response procedures specifically tailored for medical device vulnerabilities, ensuring that security teams can rapidly respond to exploitation attempts while maintaining patient safety protocols. The vulnerability highlights the critical need for robust security practices in healthcare environments, where the compromise of medical devices can have life-threatening consequences. Regular vulnerability assessments and penetration testing of medical device networks should be conducted to identify similar weaknesses before they can be exploited by malicious actors.