CVE-2019-6538 | Medtronic Conexus Radio Frequency Telemetry Protocol Improper Access Control

The Conexus telemetry protocol utilized within Medtronic MyCareLink Monitor versions 24950 and 24952, CareLink Monitor version 2490C, CareLink 2090 Programmer, Amplia CRT-D, Claria CRT-D, Compia CRT-D, Concerto CRT-D, Concerto II CRT-D, Consulta CRT-D, Evera ICD, Maximo II CRT-D and ICD, Mirro ICD, Nayamed ND ICD, Primo ICD, Protecta ICD and CRT-D, Secura ICD, Virtuoso ICD, Virtuoso II ICD, Visia AF ICD, and Viva CRT-D does not implement authentication or authorization. An attacker with adjacent short-range access to an affected product, in situations where the product’s radio is turned on, can inject, replay, modify, and/or intercept data within the telemetry communication. This communication protocol provides the ability to read and write memory values to affected implanted cardiac devices; therefore, an attacker could exploit this communication protocol to change memory in the implanted cardiac device.

Published: 2019-03-25 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2019-6538 is rated Moderate Risk (56.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.84%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-6538

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.22% 0.84% +0.62%
2 2025-11-21 0.28% 0.22% -0.06%
3 2025-11-18 0.28%

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-6538

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 3.1 CRITICAL
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
2.8 5.8 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
2.8 3.6 [email protected]
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
6.5 2.9 [email protected]

Weakness enumeration for CVE-2019-6538

Affected software / configurations for CVE-2019-6538

Vendor Product Version Raw CPE
medtronic mycarelink_monitor_firmware 24950 cpe:2.3:o:medtronic:mycarelink_monitor_firmware:24950:*:*:*:*:*:*:*
medtronic mycarelink_monitor_firmware 24952 cpe:2.3:o:medtronic:mycarelink_monitor_firmware:24952:*:*:*:*:*:*:*
medtronic carelink_monitor_firmware 2490c cpe:2.3:o:medtronic:carelink_monitor_firmware:2490c:*:*:*:*:*:*:*
medtronic carelink_2090_firmware cpe:2.3:o:medtronic:carelink_2090_firmware:-:*:*:*:*:*:*:*
medtronic amplia_crt-d_firmware cpe:2.3:o:medtronic:amplia_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic claria_crt-d_firmware cpe:2.3:o:medtronic:claria_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic compia_crt-d_firmware cpe:2.3:o:medtronic:compia_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic concerto_crt-d_firmware cpe:2.3:o:medtronic:concerto_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic concerto_ii_crt-d_firmware cpe:2.3:o:medtronic:concerto_ii_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic consulta_crt-d_firmware cpe:2.3:o:medtronic:consulta_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic evera_icd_firmware cpe:2.3:o:medtronic:evera_icd_firmware:-:*:*:*:*:*:*:*
medtronic maximo_ii_crt-d_and_lcd_firmware cpe:2.3:o:medtronic:maximo_ii_crt-d_and_lcd_firmware:-:*:*:*:*:*:*:*
medtronic mirro_icd_firmware cpe:2.3:o:medtronic:mirro_icd_firmware:-:*:*:*:*:*:*:*
medtronic nayamed_nd_icd_firmware cpe:2.3:o:medtronic:nayamed_nd_icd_firmware:-:*:*:*:*:*:*:*
medtronic primo_icd_firmware cpe:2.3:o:medtronic:primo_icd_firmware:-:*:*:*:*:*:*:*
medtronic protecta_icd_and_crt-d_firmware cpe:2.3:o:medtronic:protecta_icd_and_crt-d_firmware:-:*:*:*:*:*:*:*
medtronic secura_icd_firmware cpe:2.3:o:medtronic:secura_icd_firmware:-:*:*:*:*:*:*:*
medtronic virtuoso_icd_firmware cpe:2.3:o:medtronic:virtuoso_icd_firmware:-:*:*:*:*:*:*:*
medtronic virtuoso_ii_icd_firmware cpe:2.3:o:medtronic:virtuoso_ii_icd_firmware:-:*:*:*:*:*:*:*
medtronic visia_af_icd_firmware cpe:2.3:o:medtronic:visia_af_icd_firmware:-:*:*:*:*:*:*:*
medtronic viva_crt-d_firmware cpe:2.3:o:medtronic:viva_crt-d_firmware:-:*:*:*:*:*:*:*

References for CVE-2019-6538

URL Tags
http://www.securityfocus.com/bid/107544 Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSMA-19-080-01 Mitigation Third Party Advisory US Government Resource
cvelogic Threat Intelligence