CVE-2025-9464Network attack vector

CIP-port denial of service via crafted class traffic

Published Jan 20, 2026 · Updated Jan 20, 2026

Denial of service in Rockwell Automation ArmorStart LT 2.002 and earlier allows remote attackers to disable its CIP port over EtherNet/IP. Fuzzed traffic across multiple CIP classes leaves the port unresponsive, although Rockwell Automation has not disclosed the specific objects or resource-handling error. No authentication or user interaction is required; the documented consequence is loss of CIP communications rather than a device reboot.

CVSS severity8.7
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Rockwell Automation ArmorStart LT 2.002 and earlier allows remote attackers to disable its CIP port over EtherNet/IP. Fuzzed traffic across multiple CIP classes leaves the port unresponsive, although Rockwell Automation has not disclosed the specific objects or resource-handling error. No authentication or user interaction is required; the documented consequence is loss of CIP communications rather than a device reboot.

The record

CVE
CVE-2025-9464
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Rockwell Automation
Product
ArmorStart LT
Classifications
CWE-400, T0814
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

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
7.5NVDCVSS:3.1/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-400Uncontrolled Resource Consumption
T0814Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo