CVE-2025-9041Network attack vector

Remote module halt via mishandled CIP request

Published Aug 14, 2025 · Updated Aug 14, 2025

Improper input validation in Rockwell Automation FLEX 5000 I/O 5094-IF8 2.011 and earlier allows remote attackers to halt the module. The firmware mishandles a CIP Class 32 request while the module is inhibited, placing the module in a fault state with its status LED flashing red. The unauthenticated network request leaves the module returning connection fault 16#0010 after it is uninhibited, and operation cannot resume until a power cycle.

CVSS severity8.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Rockwell Automation FLEX 5000 I/O 5094-IF8 2.011 and earlier allows remote attackers to halt the module. The firmware mishandles a CIP Class 32 request while the module is inhibited, placing the module in a fault state with its status LED flashing red. The unauthenticated network request leaves the module returning connection fault 16#0010 after it is uninhibited, and operation cannot resume until a power cycle.

The record

CVE
CVE-2025-9041
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
Rockwell Automation
Product
FLEX 5000 I/O
Classifications
CWE-1287, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=Version 2.011 or below

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rockwell Automation · FLEX 5000 I/Oversion=Version 2.011 or 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

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.

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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-1287Improper Validation of Specified Type of Input
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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