CVE-2025-46414Network attack vector

Unauthorized access via unlimited API PIN guesses

Published Aug 8, 2025 · Updated Aug 8, 2025

PIN brute-force weakness in EG4 Electronics inverters allows remote attackers with a valid serial number to gain unauthorized access via its API. The registered-product API accepts unlimited PIN guesses and explicitly identifies a correct PIN instead of throttling or locking repeated failures. Exploitation requires a valid device serial number; successful guessing exposes the associated system to unauthorized control.

CVSS severity9.2
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PIN brute-force weakness in EG4 Electronics inverters allows remote attackers with a valid serial number to gain unauthorized access via its API. The registered-product API accepts unlimited PIN guesses and explicitly identifies a correct PIN instead of throttling or locking repeated failures. Exploitation requires a valid device serial number; successful guessing exposes the associated system to unauthorized control.

The record

CVE
CVE-2025-46414
Published
Aug 8, 2025
Updated
Aug 8, 2025
Vendor
EG4 Electronics
Product
EG4 18kPV
Classifications
CWE-307, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 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 vectornetwork
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

8.1CISA ICS-CERTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2CISA ICS-CERTCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1110.001Password Guessing

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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