What is CVE-2022-36558?

CVE-2022-36558 is a critical-severity vulnerability in Seiko-Sol Skybridge Mb-A100, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2022-08-29.

How severe is CVE-2022-36558?

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

Vulnerability in Seiko-Sol Skybridge Mb-A100

CVE-2022-36558

Seiko SkyBridge MB-A100/A110 v4.2.0 and below implements a hard-coded passcode for the root account. Attackers are able to access the passcord via the file /etc/ciel.cfg.

Published 2022-08-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

gist.github.com/Nwqda/88232102fed50b54c43871e88e993b54 (Broken Link)
www.seiko-sol.co.jp/products/skybridge/lineup/mb-a100/ (Product, Vendor Advisory)

Frequently asked questions

What is CVE-2022-36558?: CVE-2022-36558 is a critical-severity vulnerability in Seiko-Sol Skybridge Mb-A100, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2022-08-29.
How severe is CVE-2022-36558?: Critical severity. CVSS v3 base score is 9.8 out of 10.