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PatchSiren cyber security CVE debrief

CVE-2025-4395 Medtronic CVE debrief

CVE-2025-4395 affects Medtronic MyCareLink Patient Monitor models 24950 and 24952 and is rated CVSS 6.8 (Medium). The issue is a built-in user account with an empty password, which means a person with physical access to the monitor can log in without credentials and access or modify system functionality. CISA published the advisory on 2025-07-24 and later issued Update A on 2026-05-07. Medtronic characterized the findings as low-risk and said updates began rolling out in June 2025.

Vendor
Medtronic
Product
MyCareLink Patient Monitor model 24950
CVSS
MEDIUM 6.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-07-24
Original CVE updated
2026-05-07
Advisory published
2025-07-24
Advisory updated
2026-05-07

Who should care

Healthcare providers, patients using the affected MyCareLink Patient Monitor models, biomedical engineering teams, and Medtronic support/security contacts should pay attention. Security and operations teams that manage connected medical devices should confirm update status and follow vendor handling guidance.

Technical summary

The CSAF advisory describes a local, physical-access issue in Medtronic MyCareLink Patient Monitor model 24950 and model 24952. A built-in user account is configured with an empty password, allowing an attacker with physical access to authenticate with no password and interact with system functionality. The supplied advisory states the vulnerability requires physical tampering with the monitor, and Medtronic says the security update is delivered automatically when the monitor is connected to the internet.

Defensive priority

Medium

Recommended defensive actions

  • Ensure the remote monitor is connected to the internet so it can receive Medtronic's automatic security update process.
  • Maintain possession of the home monitor and prevent unauthorized physical access.
  • Use only home monitors provided directly by a healthcare provider or a Medtronic representative.
  • Continue prescribing and using monitors as intended, following Medtronic's guidance for the device.
  • Contact Medtronic security at [email protected] if additional assistance is needed.
  • Review Medtronic's security bulletin for the affected MyCareLink Patient Monitor models.
  • Follow CISA guidance on securing Internet of Things devices and home network security.

Evidence notes

Source timing is based on the supplied CVE and CSAF metadata: initial publication on 2025-07-24 and Update A on 2026-05-07. The advisory text says the finding is low-risk, requires physical tampering, and that Medtronic began deploying security updates in June 2025. The CSAF lists affected products as MyCareLink Patient Monitor model 24950 and model 24952. No KEV listing was supplied for this CVE.

Official resources

Publicly disclosed in CISA ICS Medical Advisory ICSMA-25-205-01 on 2025-07-24, with Update A published on 2026-05-07. The advisory and linked vendor guidance describe the issue and update rollout status.