CVE-2025-53520

EG4 Electronics EG4 Inverters Download of Code Without Integrity Check

Published Aug 8, 2025 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Description
The affected product allows firmware updates to be downloaded from EG4's
website, transferred via USB dongles, or installed through EG4's
Monitoring Center (remote, cloud-connected interface) or via a serial
connection, and can install these files without integrity checks. The
TTComp archive format used for the firmware is unencrypted and can be
unpacked and altered without detection.

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-2025-23995 The affected product allows firmware updates to be downloaded from EG4's website, transferred via USB dongles, or installed through EG4's Monitoring Center (remote, cloud-connected interface) or via a serial connection, and can install these files without integrity checks. The TTComp archive format used for the firmware is unencrypted and can be unpacked and altered without detection.
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 affected product allows firmware updates to be downloaded from EG4's website, transferred via USB dongles, or installed through EG4's Monitoring Center (remote, cloud-connected interface) or via a serial connection, and can install these files without integrity checks. The TTComp archive format used for the firmware is unencrypted and can be unpacked and altered without detection.
Title EG4 Electronics EG4 Inverters Download of Code Without Integrity Check
Weaknesses CWE-494
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Aug 8, 2025, 7:12 PM
Reserved
Jul 30, 2025, 7:03 PM
Status
Deferred
Published
Aug 8, 2025, 5:15 PM
Modified
Jun 17, 2026, 9:38 AM