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Fencer Vulns
high 8.8

CVE-2025-53520 json

EG4 Electronics EG4 Inverters Download of Code Without Integrity Check

published 2025-08-08 15 mo ago modified 2026-06-17 4 mo 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.

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
15 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 Vulns 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.