What is CVE-2021-27426?

CVE-2021-27426 is a critical-severity vulnerability in Ge Multilin B30, classified under CWE-453. CVSS score: 9.8/10. Published 2022-03-23.

How severe is CVE-2021-27426?

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

Vulnerability in Ge Multilin B30

CVE-2021-27426

GE UR IED firmware versions prior to version 8.1x with “Basic” security variant does not allow the disabling of the “Factory Mode,” which is used for servicing the IED by a “Factory” user.

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 (67.9th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.9% 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-453

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-2021-27426?: CVE-2021-27426 is a critical-severity vulnerability in Ge Multilin B30, classified under CWE-453. CVSS score: 9.8/10. Published 2022-03-23.
How severe is CVE-2021-27426?: Critical severity. CVSS v3 base score is 9.8 out of 10.