What is CVE-2019-17186?

CVE-2019-17186 is a high-severity vulnerability in Fiberhome Hg2201t, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2019-10-08.

How severe is CVE-2019-17186?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Fiberhome Hg2201t

CVE-2019-17186

/var/WEB-GUI/cgi-bin/telnet.cgi on FiberHome HG2201T 1.00.M5007_JS_201804 devices allows pre-authentication remote code execution.

Vulnerability class: Broken Authentication

Published 2019-10-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.059 (93.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.059 · newest: 0.059 · change: 0.000

Affected products

Fiberhome Hg2201t
Fiberhome Hg2201t Firmware — versions hg2201t_1.00.m5007_js_201804

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

gist.github.com/ztz472947849/d62e7b6f4831b55c338ef22432eca06d (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-17186?: CVE-2019-17186 is a high-severity vulnerability in Fiberhome Hg2201t, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2019-10-08.
How severe is CVE-2019-17186?: High severity. CVSS v3 base score is 8.8 out of 10.