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Fencer Intel
high 8.8

CVE-2025-53520 json

EG4 Electronics EG4 Inverters Download of Code Without Integrity Check

published last yr. modified 4mo ago also EUVD-2025-23995

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-219-07 updated cvss 8.8

EG4 Electronics EG4 Inverters (Update B)

  • EG4 Electronics EG4 12kPV EG4 Electronics EG4 18kPV EG4 Electronics EG4 6000XP EG4 Electronics EG4 12000XP EG4 Electronics EG4 Flex 18 EG4 Electronics EG4 Flex 21
    +1 more products
    EG4 Electronics EG4 GridBoss
    affected: mitigation “For more information, contact EG4.” eg4electronics.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 8.6 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
CNA 4.0 8.6 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • EG4 Electronics EG4 12kPV
  • EG4 Electronics EG4 18kPV
  • EG4 Electronics EG4 Flex 21
  • EG4 Electronics EG4 Flex 18
  • EG4 Electronics EG4 6000XP
  • EG4 Electronics EG4 12000XP
  • EG4 Electronics EG4 GridBoss

Classification

Weakness
  • CWE-494 Download of Code Without Integrity Check

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.