What is CVE-2019-12797?

CVE-2019-12797 is a critical-severity vulnerability in Elmelectronics Elm27, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2019-07-31.

How severe is CVE-2019-12797?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Elmelectronics Elm27

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.

Published 2019-07-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.2th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

Frequently asked questions

What is CVE-2019-12797?: CVE-2019-12797 is a critical-severity vulnerability in Elmelectronics Elm27, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2019-07-31.
How severe is CVE-2019-12797?: Critical severity. CVSS v3 base score is 9.8 out of 10.