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CVE-2025-9368 Rockwell Automation CVE debrief

Rockwell Automation’s 432ES-IG3 Series A is affected by a denial-of-service vulnerability in the GuardLink EtherNet/IP Interface. According to the CISA-republished advisory, the condition can disrupt availability and requires a manual power cycle to restore the device. Rockwell’s documented fix is to update to V2.001.9 or later.

Vendor
Rockwell Automation
Product
432ES-IG3 Series A
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-13
Original CVE updated
2026-01-13
Advisory published
2026-01-13
Advisory updated
2026-01-13

Who should care

Industrial control system owners, operators, and maintenance teams using Rockwell Automation 432ES-IG3 Series A devices, especially environments where loss of availability could interrupt operations.

Technical summary

CVE-2025-9368 is a network-reachable availability issue affecting Rockwell Automation 432ES-IG3 Series A. The advisory describes a denial-of-service condition in the GuardLink EtherNet/IP Interface, with recovery requiring a manual power cycle. The provided CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, which aligns with a high-severity availability impact and no stated confidentiality or integrity impact.

Defensive priority

High. The issue is easy to reach over the network, can take the device out of service, and requires manual recovery. Update planning should be prioritized for any exposed or production-deployed 432ES-IG3 Series A devices.

Recommended defensive actions

  • Upgrade affected 432ES-IG3 Series A devices to Rockwell Automation V2.001.9 or later using the vendor download path provided in the advisory.
  • If an immediate upgrade is not possible, follow Rockwell Automation’s security best practices and CISA industrial control systems recommended practices.
  • Identify where 432ES-IG3 Series A devices are deployed and confirm whether any are exposed to broader network access than necessary.
  • Reduce exposure by limiting access to trusted OT management networks and using appropriate segmentation and defensive monitoring.
  • Plan maintenance and recovery procedures with the expectation that a manual power cycle may be required if the denial-of-service condition occurs.

Evidence notes

The source corpus states that CISA republished Rockwell Automation advisory SD1764 as ICSA-26-013-01 on 2026-01-13. The advisory text explicitly says the issue affects 432ES-IG3 Series A, causes a denial-of-service condition, and requires a manual power cycle to recover. Rockwell’s remediation entry recommends updating to V2.001.9 or later. No KEV entry or ransomware-campaign linkage is included in the supplied data.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-9368 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-9368

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-9368 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-9368

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-013-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-013-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.