CVE-2025-47872

EG4 Electronics EG4 Inverters Observable Discrepancy

Published Aug 8, 2025 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
The public-facing product registration endpoint server responds
differently depending on whether the S/N is valid and unregistered,
valid but already registered, or does not exist in the database.
Combined with the fact that serial numbers are sequentially assigned,
this allows an attacker to gain information on the product registration
status of different S/Ns.

Remediation

Vendor Workaround

EG4 has acknowledged the vulnerabilities and is actively working on a fix, including new hardware expected to release by October 15, 2025. Until then, EG4 will actively monitor all installed systems and work with affected users on a case-by-case basis if anomalies are observed. For more information, contact EG4. https://eg4electronics.com/contact/

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-23993 The public-facing product registration endpoint server responds differently depending on whether the S/N is valid and unregistered, valid but already registered, or does not exist in the database. Combined with the fact that serial numbers are sequentially assigned, this allows an attacker to gain information on the product registration status of different S/Ns.
History
Type Values Removed Values Added
First Time appeared Eg4 Electronics
Eg4 Electronics eg4 12000xp
Eg4 Electronics eg4 12kpv
Eg4 Electronics eg4 18kpv
Eg4 Electronics eg4 6000xp
Eg4 Electronics eg4 Flex 18
Eg4 Electronics eg4 Flex 21
Eg4 Electronics eg4 Gridboss
Vendors & Products Eg4 Electronics
Eg4 Electronics eg4 12000xp
Eg4 Electronics eg4 12kpv
Eg4 Electronics eg4 18kpv
Eg4 Electronics eg4 6000xp
Eg4 Electronics eg4 Flex 18
Eg4 Electronics eg4 Flex 21
Eg4 Electronics eg4 Gridboss
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The public-facing product registration endpoint server responds differently depending on whether the S/N is valid and unregistered, valid but already registered, or does not exist in the database. Combined with the fact that serial numbers are sequentially assigned, this allows an attacker to gain information on the product registration status of different S/Ns.
Title EG4 Electronics EG4 Inverters Observable Discrepancy
Weaknesses CWE-203
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Aug 8, 2025, 7:13 PM
Reserved
Jul 30, 2025, 7:03 PM
Status
Deferred
Published
Aug 8, 2025, 5:15 PM
Modified
Jun 17, 2026, 9:28 AM