MEDIUM
CVE-2021-27424
CWE-200Published: March 23, 2022· Updated: Jun 17, 2026
5.3
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2021-27424 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Vendors & Products
ge38 product(s)
multilin b30 firmwaremultilin b30multilin b90 firmwaremultilin b90multilin c60 firmwaremultilin c60multilin c70 firmwaremultilin c70multilin c95 firmwaremultilin c95multilin d30 firmwaremultilin d30+26
Source: NVD CPE · 38 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02Mitigation · Third Party Advisory · US Government Resource
→
https://www.gegridsolutions.com/Passport/Login.aspxPermissions Required · Vendor Advisory
→
https://www.cisa.gov/uscert/ics/advisories/icsa-21-075-02Mitigation · Third Party Advisory · US Government Resource
→
https://www.gegridsolutions.com/Passport/Login.aspxPermissions Required · Vendor Advisory
Quick Facts
CVE IDCVE-2021-27424
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
Affected1 vendor(s)
PublishedMar 23, 2022
Related CVEs (CWE-200)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-27424 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.