CVE-2025-4393
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMedtronic 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
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe MyCareLink Patient Monitor contains an internal service with insecure deserialization. A local attacker with access to the device can craft a malicious binary payload that, when processed by the vulnerable deserialization routine, enables service crash (denial of service) or privilege escalation to higher authorization levels.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify device modelLocate the MyCareLink Patient Monitor and verify the model number is 24950 (or variant). This is typically found on a label on the device casing or in the device settings/about section.Affected if The device model is 24950 or related model in the affected product line.
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Check firmware versionAccess the device settings or system information menu to view the current firmware version. Compare it against the version released on or before June 25, 2025 which contains the security fix.Affected if The installed firmware version is older than the update released before June 25, 2025, or the firmware version cannot be verified.
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Verify internal service exposureIf you have administrative access, review the device's running services or network listening ports to identify any internal deserialization service. Check service logs for unexpected binary processing activity.Affected if An internal service capable of deserializing binary payloads is present and accessible on the device.
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Assess physical access controlsEvaluate who has physical access to the patient monitor. Determine if unauthorized individuals could gain local access to the device.Affected if Physical access controls are insufficient or the device is located in an area with unrestricted access.
A user is affected if they have a MyCareLink Patient Monitor model 24950 running firmware older than the June 2025 update and the device or its internal services are accessible to unauthorized local attackers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the vendor-provided firmware update released before June 25, 2025 to affected models 24950 and 24950. Until updated, restrict physical access to the device and monitor for unauthorized local access attempts.
- Consultation8.0 h
- Implementation4.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4393 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-4393 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data