CVE-2025-9279Network attack vector

Unauthenticated reboot via EtherNet/IP Step Limit storm

Published Jan 20, 2026 · Updated Jan 20, 2026

Uncontrolled resource consumption in Rockwell Automation ArmorStart LT V2.002 and earlier allows remote attackers to reboot the device. The EtherNet/IP processing path fails to withstand Step Limit Storm traffic and unexpectedly restarts the controller instead of maintaining service. No authentication or user interaction is required; the Link State Monitor drops for several seconds while the device reboots.

CVSS severity8.7
High
EPSS probability0.55%
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 Rockwell Automation ArmorStart LT V2.002 and earlier allows remote attackers to reboot the device. The EtherNet/IP processing path fails to withstand Step Limit Storm traffic and unexpectedly restarts the controller instead of maintaining service. No authentication or user interaction is required; the Link State Monitor drops for several seconds while the device reboots.

The record

CVE
CVE-2025-9279
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Rockwell Automation
Product
ArmorStart LT
Classifications
CWE-400, T1498.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 2026Record 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=V2.002 and below

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · ArmorStart LTversion=V2.002 and below

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7Rockwell AutomationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-400Uncontrolled Resource Consumption
T1498.001Direct Network 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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