CVE-2025-4386 Medtronic CVE debrief

Who should care

Patients using the affected MyCareLink home monitors, clinicians who prescribe or manage them, biomedical/clinical engineering teams, and Medtronic support or security staff responsible for device update status.

Technical summary

According to CISA CSAF advisory ICSMA-25-205-01, the affected monitors include an internal serial interface that can present a login prompt when accessed over UART. The attack path requires physical tampering and is reflected in the supplied CVSS 3.1 vector (AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The advisory revision history shows the initial publication on 2025-07-24 and Update A on 2026-05-07.

Defensive priority

Moderate: the issue is physically constrained and already being addressed by the vendor, but it involves a medical device used in home settings and should still be validated and tracked.

Recommended defensive actions

• Ensure the remote monitor is connected to the internet so Medtronic’s automatic security update process can run.
• Maintain possession of the home monitor and do not leave it exposed to unauthorized physical access.
• Use only home monitors provided directly from a healthcare provider or a Medtronic representative.
• If additional assistance is needed, contact Medtronic Security at [email protected].
• Review Medtronic’s security bulletin for the affected MyCareLink Patient Monitor models.
• Follow CISA guidance on securing Internet of Things devices.
• Follow CISA guidance on home network security.
• For prescribing or care workflows, continue to use the monitors as intended while confirming update status and physical custody controls.

Evidence notes

All statements are derived from the supplied CISA CSAF advisory record and its referenced remediation text. The source identifies the affected products as MyCareLink Patient Monitor models 24950 and 24952, describes the issue as an internal serial interface that allows UART access to a login prompt with physical access, and states that the vulnerabilities were reported as low-risk findings. The remediation text says Medtronic began deploying updates in June 2025 and that the monitor updates automatically when connected to the internet. Dates in this debrief use the CVE/advisory published and modified timestamps supplied in the corpus.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.