How severe is CVE-2019-12797?

CVE-2019-12797 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-12797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12797?

CVE-2019-12797 affects Elmelectronics Elm27 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12797?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-12797 published?

CVE-2019-12797 was published on 2019-07-31 and last updated on 2026-06-17.

CVE-2019-12797

CVE-2019-12797 is a critical-severity vulnerability in Elmelectronics Elm27 Firmware with a CVSS 3.x base score of 9.8. 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-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Elmelectronics Elm27 Firmware
Published: 2019-07-31
Last modified: 2026-06-17

Description

A clone version of an ELM327 OBD2 Bluetooth device has a hardcoded PIN, leading to arbitrary commands to an OBD-II bus of a vehicle.

Frequently asked questions

What is CVE-2019-12797?: A clone version of an ELM327 OBD2 Bluetooth device has a hardcoded PIN, leading to arbitrary commands to an OBD-II bus of a vehicle.
How severe is CVE-2019-12797?: CVE-2019-12797 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-12797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12797?: CVE-2019-12797 affects Elmelectronics Elm27 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12797?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-12797 published?: CVE-2019-12797 was published on 2019-07-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:elmelectronics:elm27_firmware:-:*:*:*:*:*:*:*

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