VULNERABILITY INTELLIGENCE

CVE-2021-27420

CVSS score5.3 MEDIUM

EPSS probability1.06%

CISA KEVNot currently listed

Published2022-03-23

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.

Weakness classification

ics-cert@hq.dhs.gov: CWE-20
nvd@nist.gov: CWE-20

Primary references

ics-cert@hq.dhs.gov — Mitigation, Third Party Advisory, US Government Resource
ics-cert@hq.dhs.gov — Permissions Required, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mitigation, Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Permissions Required, Vendor Advisory