CVE-2018-25112Network attack vector

Service interruption via network-induced CPU exhaustion

Published Jun 4, 2025 · Updated Jun 4, 2025

Uncontrolled resource consumption in Phoenix Contact ILC 1x1 ETH firmware allows remote attackers to interrupt PLC operation via network flooding. The controller spends so much CPU time handling high-volume network traffic that its IEC 61131 processing program slows or stops. No authentication is required; automation functions recover after the traffic load is removed, so the interruption is temporary rather than persistent.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Phoenix Contact ILC 1x1 ETH firmware allows remote attackers to interrupt PLC operation via network flooding. The controller spends so much CPU time handling high-volume network traffic that its IEC 61131 processing program slows or stops. No authentication is required; automation functions recover after the traffic load is removed, so the interruption is temporary rather than persistent.

The record

CVE
CVE-2018-25112
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
Phoenix Contact
Product
ILC 171 ETH 2TX
Classifications
CWE-770, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 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=vers:all/*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Phoenix Contact · ILC 171 ETH 2TXversion=vers:all/*
Phoenix Contact · ILC 151 ETHversion=vers:all/*
Phoenix Contact · ILC 131 ETHversion=vers:all/*
Phoenix Contact · ILC 191 ETH 2TXversion=vers:all/*

Published CVSS scores

7.5CERT@VDECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Phoenix ContactCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Service Exhaustion Flood

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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