CVE-2025-4393 Medtronic CVE debrief

Who should care

Patients using the affected MyCareLink home monitor, clinicians who prescribe or support it, and biomedical/IT staff responsible for connected home-monitor deployments should pay attention, especially for model 24950 and model 24952.

Technical summary

The supplied CISA CSAF advisory describes an internal service that deserializes data. The stated attack path requires local access/physical tampering with the device, after which a crafted binary payload could interact with the service to cause a crash or privilege escalation. The advisory references CWE-502 and notes Medtronic began deploying security updates in June 2025.

Defensive priority

Medium. The impact includes service disruption and possible privilege escalation, but the advisory also says exploitation would require physical tampering/local access and Medtronic describes the findings as low-risk.

Recommended defensive actions

• Ensure the monitor is connected to the internet so the automatic security update process can complete.
• Keep possession of the home monitor and do not leave it accessible to untrusted parties.
• Use only home monitors provided directly by a healthcare provider or a Medtronic representative.
• If you need assistance, contact Medtronic at [email protected].
• Follow CISA guidance for securing internet-connected devices and home networks.
• For clinical workflows, continue prescribing and using the monitor as intended while ensuring affected units receive updates.

Evidence notes

All core claims come from the supplied CISA CSAF advisory and its embedded remediation text. The advisory revision history shows initial publication on 2025-07-24 and Update A on 2026-05-07. The remediation text states that security updates are applied automatically when the monitor is connected to the internet, and that users should maintain possession of the home monitor and only use monitors provided directly by a healthcare provider or Medtronic representative.

Official resources