CVE-2021-27422Network attack vector

Unauthenticated information exposure via cleartext web interface

Published Mar 23, 2022 · Updated Apr 16, 2025

Information exposure in GE Multilin Universal Relay firmware before 8.1x allows remote attackers to read sensitive data over HTTP. The embedded web server serves its interface over unencrypted HTTP and exposes sensitive information without requiring authentication. Network reachability to the relay web interface is sufficient; published materials do not identify the exposed fields or request path.

CVSS severity7.5
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in GE Multilin Universal Relay firmware before 8.1x allows remote attackers to read sensitive data over HTTP. The embedded web server serves its interface over unencrypted HTTP and exposes sensitive information without requiring authentication. Network reachability to the relay web interface is sufficient; published materials do not identify the exposed fields or request path.

The record

CVE
CVE-2021-27422
Published
Mar 23, 2022
Updated
Apr 16, 2025
Vendor
General Electric
Product
Multilin Universal Relay Family
Classifications
CWE-200, CWE-319
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <8.1x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

General Electric · Multilin Universal Relay Familyversion=unspecified <8.1x

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-319Cleartext Transmission of Sensitive Information

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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