What is CVE-2019-17354?

CVE-2019-17354 is a critical-severity vulnerability in Zyxel Nbg-418n V2, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2019-10-09.

How severe is CVE-2019-17354?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Auth bypass in Zyxel Nbg-418n V2

CVE-2019-17354

wan.htm page on Zyxel NBG-418N v2 with firmware version V1.00(AARP.9)C0 can be accessed directly without authentication, which can lead to disclosure of information about the WAN, and can also be leveraged by an attacker to modify data fields of the page.

Vulnerability class: Broken Authentication

Published 2019-10-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.5th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Zyxel Nbg-418n V2
Zyxel Nbg-418n V2 Firmware — versions 1.00\(aarp.9\)c0, 1.00(aarp.9)c0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.zyxel.com/us/en/ (Product)
github.com/d0x0/Zyxel-NBG-418N-v2/blob/master/CVE-2019-17354 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-17354?: CVE-2019-17354 is a critical-severity vulnerability in Zyxel Nbg-418n V2, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2019-10-09.
How severe is CVE-2019-17354?: Critical severity. CVSS v3 base score is 9.4 out of 10.