What is CVE-2018-12049?

CVE-2018-12049 is a critical-severity vulnerability in Canon Lbp6030w, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-06-08.

How severe is CVE-2018-12049?

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

Auth bypass in Canon Lbp6030w

CVE-2018-12049

A remote attacker can bypass the System Manager Mode on the Canon LBP6030w web interface without a PIN for /checkLogin.cgi via vectors involving /portal_top.html to get full access to the device. NOTE: the vendor reportedly responded that this issue occurs when a customer keeps the default settings without using the countermeasures and best practices shown in the documentation

Vulnerability class: Broken Authentication

Published 2018-06-08 · 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: 0.051 (92.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.051 · newest: 0.051 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.exploit-db.com/exploits/44886/ (VDB Entry, Third Party Advisory, exploit, Broken Link)
gist.github.com/huykha/0381acb2dc580c728a79452b60fa082c (Third Party Advisory, Broken Link)

Frequently asked questions

What is CVE-2018-12049?: CVE-2018-12049 is a critical-severity vulnerability in Canon Lbp6030w, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-06-08.
How severe is CVE-2018-12049?: Critical severity. CVSS v3 base score is 9.8 out of 10.