What is CVE-2026-1222?

CVE-2026-1222 is a high-severity vulnerability in Browan Communications Prismx Mx100 Ap Controller, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-01-20.

How severe is CVE-2026-1222?

High severity. CVSS v3 base score is 7.2 out of 10.

Arbitrary file upload in Browan Communications Prismx Mx100 Ap Controller

CVE-2026-1222

PrismX MX100 AP controller developed by BROWAN COMMUNICATIONS has an Arbitrary File Upload vulnerability, allowing privileged remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.

Vulnerability class: Unrestricted File Upload

Published 2026-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (49.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.001

Affected products

Browan Communications Prismx Mx100 Ap Controller — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.twcert.org.tw/tw/cp-132-10642-3b808-1.html (third-party-advisory)
www.twcert.org.tw/en/cp-139-10643-2f8d7-2.html (third-party-advisory)

Frequently asked questions

What is CVE-2026-1222?: CVE-2026-1222 is a high-severity vulnerability in Browan Communications Prismx Mx100 Ap Controller, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2026-01-20.
How severe is CVE-2026-1222?: High severity. CVSS v3 base score is 7.2 out of 10.