What is CVE-2016-5791?

CVE-2016-5791 is a critical-severity vulnerability in Jantek Jtc-200, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-10-13.

How severe is CVE-2016-5791?

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

Auth bypass in Jantek Jtc-200

CVE-2016-5791

An Improper Authentication issue was discovered in JanTek JTC-200, all versions. The improper authentication could provide an undocumented BusyBox Linux shell accessible over the TELNET service without any authentication.

Vulnerability class: Broken Authentication

Published 2017-10-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

ics-cert.us-cert.gov/advisories/ICSA-17-283-02 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2016-5791?: CVE-2016-5791 is a critical-severity vulnerability in Jantek Jtc-200, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-10-13.
How severe is CVE-2016-5791?: Critical severity. CVSS v3 base score is 9.8 out of 10.