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Fencer Vulns
medium 5.8

CVE-2025-47872 json

EG4 Electronics EG4 Inverters Observable Discrepancy

published 2025-08-08 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23993

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

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.

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 5.8

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 “CVE-2025-47872: EG4 standardized the endpoint responses to eliminate the risk of enumerating sensitive data. This was deployed on August 14, 2025. No action is required from users.” 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

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CNA 4.0 6.9 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
CNA 4.0 6.9 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/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

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.