What is CVE-2018-18754?

CVE-2018-18754 is a critical-severity vulnerability in Zyxel Vmg3312-B10b, classified under Insufficiently Protected Credentials. CVSS score: 9.8/10. Published 2018-10-29.

How severe is CVE-2018-18754?

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

Vulnerability in Zyxel Vmg3312-B10b

CVE-2018-18754

ZyXEL VMG3312-B10B 1.00(AAPP.7) devices have a backdoor root account with the tTn3+Z@!Sr0O+ password hash in the etc/default.cfg file.

Published 2018-10-29 · 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: 0.011 (63.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Zyxel Vmg3312-B10b
Zyxel Vmg3312-B10b Firmware — versions 1.00\(aapp.7\), 1.00(aapp.7)

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

gist.github.com/numanturle/c99d3306e9e4e17bb2164dde363406bc (Third Party Advisory)

Frequently asked questions

What is CVE-2018-18754?: CVE-2018-18754 is a critical-severity vulnerability in Zyxel Vmg3312-B10b, classified under Insufficiently Protected Credentials. CVSS score: 9.8/10. Published 2018-10-29.
How severe is CVE-2018-18754?: Critical severity. CVSS v3 base score is 9.8 out of 10.