What is CVE-2021-27424?

CVE-2021-27424 is a medium-severity vulnerability in Ge Multilin B30, classified under Information Disclosure. CVSS score: 5.3/10. Published 2022-03-23.

How severe is CVE-2021-27424?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Ge Multilin B30

CVE-2021-27424

GE UR firmware versions prior to version 8.1x shares MODBUS memory map as part of the communications guide. GE was made aware a “Last-key pressed” MODBUS register can be used to gain unauthorized information.

Vulnerability class: Information Disclosure

Published 2022-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.4th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Weakness classification (CWE)

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-2021-27424?: CVE-2021-27424 is a medium-severity vulnerability in Ge Multilin B30, classified under Information Disclosure. CVSS score: 5.3/10. Published 2022-03-23.
How severe is CVE-2021-27424?: Medium severity. CVSS v3 base score is 5.3 out of 10.