What is CVE-2022-36557?

CVE-2022-36557 is a critical-severity vulnerability in Seiko-Sol Skybridge Mb-A100, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-08-29.

How severe is CVE-2022-36557?

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

Arbitrary file upload in Seiko-Sol Skybridge Mb-A100

CVE-2022-36557

Seiko SkyBridge MB-A100/A110 v4.2.0 and below was discovered to contain an arbitrary file upload vulnerability via the restore backup function. This vulnerability allows attackers to execute arbitrary code via a crafted html file.

Vulnerability class: Unrestricted File Upload

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: 0.011 (63.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.2% 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

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

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-2022-36557?: CVE-2022-36557 is a critical-severity vulnerability in Seiko-Sol Skybridge Mb-A100, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-08-29.
How severe is CVE-2022-36557?: Critical severity. CVSS v3 base score is 9.8 out of 10.