CVE-2019-18246: BIOTRONIK CardioMessenger II, The affected products do not properly enforce mutual authentication with the BIO

Routine

MEDIUM 4.3MITIGATEMITIGATE

CVE-2019-18246 is a medium-severity flaw (CVSS 4.3) affecting cardiomessenger ii-s gsm firmware, cardiomessenger ii-s t-line firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

BIOTRONIK CardioMessenger II, The affected products do not properly enforce mutual authentication with the BIOTRONIK Remote Communication infrastructure.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-287
Published	2020-06-29
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: biotronik

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-06-29 14:15 UTCPublished CVE record published
2026-06-17 02:24 UTCUpdated Record last modified

biotronik cardiomessenger ii-s gsm firmware MITIGATE

Affected: 2.20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.20

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

biotronik cardiomessenger ii-s t-line firmware MITIGATE

Affected: 2.20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.20

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-18246?

cardiomessenger ii-s gsm firmware: mitigate or apply the listed mitigation; cardiomessenger ii-s t-line firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-18246 being exploited?

CVE-2019-18246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-18246 affect?

CVE-2019-18246 affects cardiomessenger ii-s gsm firmware, cardiomessenger ii-s t-line firmware. Severity is medium (CVSS 4.3). BIOTRONIK CardioMessenger II, The affected products do not properly enforce mutual authentication with the BIOTRONIK Remote Communication infrastructure.

How urgent is CVE-2019-18246?

Priority 25/100. No elevated risk signals yet.

Related CVEs

CVE-2019-18256 MEDIUM 4.6 MITIGATE MITIGATE BIOTRONIK CardioMessenger II, The affected products use individual per-device credentials that are stored in a
CVE-2019-18254 MEDIUM 4.6 MITIGATE MITIGATE BIOTRONIK CardioMessenger II, The affected products do not encrypt sensitive information while at rest
CVE-2019-18252 MEDIUM 4.3 MITIGATE MITIGATE BIOTRONIK CardioMessenger II, The affected products allow credential reuse for multiple authentication purpose
CVE-2019-18248 MEDIUM 4.3 MITIGATE MITIGATE BIOTRONIK CardioMessenger II, The affected products transmit credentials in clear-text prior to switching to a

References

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