How severe is CVE-2019-18256?

CVE-2019-18256 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-18256 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18256?

CVE-2019-18256 primarily affects Biotronik Cardiomessenger Ii-s Gsm Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-18256?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-18256 published?

CVE-2019-18256 was published on 2020-06-29 and last updated on 2026-06-17.

CVE-2019-18256

CVE-2019-18256 is a medium-severity vulnerability in Biotronik Cardiomessenger Ii-s Gsm Firmware with a CVSS 3.x base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 2.1
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Biotronik Cardiomessenger Ii-s Gsm Firmware
Published: 2020-06-29
Last modified: 2026-06-17

Description

BIOTRONIK CardioMessenger II, The affected products use individual per-device credentials that are stored in a recoverable format. An attacker with physical access to the CardioMessenger can use these credentials for network authentication and decryption of local data in transit.

Frequently asked questions

What is CVE-2019-18256?: BIOTRONIK CardioMessenger II, The affected products use individual per-device credentials that are stored in a recoverable format. An attacker with physical access to the CardioMessenger can use these credentials for network authentication and decryption of local data in transit.
How severe is CVE-2019-18256?: CVE-2019-18256 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-18256 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18256?: CVE-2019-18256 primarily affects Biotronik Cardiomessenger Ii-s Gsm Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-18256?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-18256 published?: CVE-2019-18256 was published on 2020-06-29 and last updated on 2026-06-17.

References

https://www.us-cert.gov/ics/advisories/icsma-20-170-05

Affected products (2)

cpe:2.3:o:biotronik:cardiomessenger_ii-s_gsm_firmware:2.20:*:*:*:*:*:*:*
cpe:2.3:o:biotronik:cardiomessenger_ii-s_t-line_firmware:2.20:*:*:*:*:*:*:*

More vulnerabilities in Biotronik Cardiomessenger Ii-s Gsm Firmware

CVE-2019-18254 — Medium (CVSS 4.6): BIOTRONIK CardioMessenger II, The affected products do not encrypt sensitive information while at rest. An attacker…
CVE-2019-18252 — Medium (CVSS 4.3): BIOTRONIK CardioMessenger II, The affected products allow credential reuse for multiple authentication purposes. An…
CVE-2019-18248 — Medium (CVSS 4.3): BIOTRONIK CardioMessenger II, The affected products transmit credentials in clear-text prior to switching to an…
CVE-2019-18246 — Medium (CVSS 4.3): BIOTRONIK CardioMessenger II, The affected products do not properly enforce mutual authentication with the BIOTRONIK…

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