What is CVE-2018-11491?

CVE-2018-11491 is a critical-severity vulnerability in ASUS Hg100, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-07-25.

How severe is CVE-2018-11491?

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

Auth bypass in ASUS Hg100

CVE-2018-11491

ASUS HG100 devices with firmware before 1.05.12 allow unauthenticated access, leading to remote command execution.

Vulnerability class: Broken Authentication

Published 2018-07-25 · 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: 0.067 (93.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.067 · newest: 0.067 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

mars-cheng.github.io/blog/2018/CVE-2018-11491/ (Exploit, Third Party Advisory)
www.asus.com/tw/News/qnEosWKPVDpmOeqL (Vendor Advisory)

Frequently asked questions

What is CVE-2018-11491?: CVE-2018-11491 is a critical-severity vulnerability in ASUS Hg100, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-07-25.
How severe is CVE-2018-11491?: Critical severity. CVSS v3 base score is 9.8 out of 10.