What is CVE-2021-27428?

CVE-2021-27428 is a critical-severity vulnerability in Ge Multilin B30, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-03-23.

How severe is CVE-2021-27428?

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

Arbitrary file upload in Ge Multilin B30

CVE-2021-27428

GE UR IED firmware versions prior to version 8.1x supports upgrading firmware using UR Setup configuration tool – Enervista UR Setup. This UR Setup tool validates the authenticity and integrity of firmware file before uploading the UR IED. An illegitimate user could upgrade firmware without appropriate privileges. The weakness is assessed, and mitigation is implemented in firmware Version 8.10.

Vulnerability class: Unrestricted File Upload

Published 2022-03-23 · 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: 0.012 (68.0th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.cisa.gov/uscert/ics/advisories/icsa-21-075-02 (US Government Resource, Third Party Advisory, Mitigation)
www.gegridsolutions.com/Passport/Login.aspx (Vendor Advisory, Permissions Required)

Frequently asked questions

What is CVE-2021-27428?: CVE-2021-27428 is a critical-severity vulnerability in Ge Multilin B30, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-03-23.
How severe is CVE-2021-27428?: Critical severity. CVSS v3 base score is 9.8 out of 10.