CVE-2025-52586

Inverter command interception via plaintext MOD3 traffic

Published Aug 8, 2025 · Updated Sep 8, 2025

Cleartext transmission in EG4 inverters of all versions allows attackers on the local network to intercept and alter MOD3 traffic. The monitoring application exchanges read/write configuration, telemetry, alarm, reset, and control commands with the inverter without encryption or obfuscation. Access to the inverter's local network is required; captured commands can be replayed or forged to reconfigure settings or interrupt power generation.

CVSS severity7.5
High
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in EG4 inverters of all versions allows attackers on the local network to intercept and alter MOD3 traffic. The monitoring application exchanges read/write configuration, telemetry, alarm, reset, and control commands with the inverter without encryption or obfuscation. Access to the inverter's local network is required; captured commands can be replayed or forged to reconfigure settings or interrupt power generation.

The record

CVE
CVE-2025-52586
Published
Aug 8, 2025
Updated
Sep 8, 2025
Vendor
EG4 Electronics
Product
EG4 18kPV
Classifications
CWE-319, T1040, T1565
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=all versions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

EG4 Electronics · EG4 18kPVversion=all versions
EG4 Electronics · EG4 FlexBOSS18version=all versions
EG4 Electronics · EG4 12kPVversion=all versions
EG4 Electronics · EG4 6000XPversion=all versions
EG4 Electronics · EG4 GridBOSSversion=all versions
EG4 Electronics · EG4 FlexBOSS21version=all versions
EG4 Electronics · EG4 12000XPversion=all versions

Published CVSS scores

7.5CISA ICS-CERTCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
6.9CISA ICS-CERTCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing
T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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