What is CVE-2018-9249?

CVE-2018-9249 is a critical-severity vulnerability in Fiberhome Vdsl2 Modem Hg 150-Ub, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-04-04.

How severe is CVE-2018-9249?

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

Auth bypass in Fiberhome Vdsl2 Modem Hg 150-Ub

CVE-2018-9249

FiberHome VDSL2 Modem HG 150-UB devices allow authentication bypass by ignoring the parent.location='login.html' JavaScript code in the response to an unauthenticated request.

Vulnerability class: Broken Authentication

Published 2018-04-04 · 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: 0.061 (93.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.062 · newest: 0.061 · change: -0.001

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

gist.github.com/pak0s/cd7ac9c2ee659138816f92693d2df602 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-9249?: CVE-2018-9249 is a critical-severity vulnerability in Fiberhome Vdsl2 Modem Hg 150-Ub, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-04-04.
How severe is CVE-2018-9249?: Critical severity. CVSS v3 base score is 9.8 out of 10.