high severity September 01, 2026 · 1 min read

CISA ICS Advisory: Rockwell Automation ControlLogix, CompactLogix, CompactLogix 5480, GuardLogix, Compact GuardLogix

Here’s what this advisory affects, and what to do about it.

The following versions of Rockwell Automation ControlLogix, CompactLogix, CompactLogix 5480, GuardLogix, Compact GuardLogix are affected: ControlLogix 5580 GuardLogix 5580 CompactLogix 5380 Compact GuardLogix 5380 CompactLogix 5480 Rockwell Automation ControlLogix, CompactLogix, CompactLogix 5480, GuardLogix, Compact GuardLogix

CISA ICS Advisory: Rockwell Automation ControlLogix, CompactLogix, CompactLogix 5480, GuardLogix, Compact GuardLogix

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On September 1, 2026, the Cybersecurity and Infrastructure Security Agency (CISA) released an ICS advisory detailing vulnerabilities in multiple Rockwell Automation programmable logic controller families.

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Improper Input Validation in Logix Controllers

The advisory indicates that certain Rockwell Automation controllers contain an improper input validation flaw. Successful exploitation could allow an attacker to cause a denial-of-service condition or execute arbitrary code on affected devices.

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Affected Products

The following controllers are affected:

ControlLogix 5580
GuardLogix 5580
CompactLogix 5380
Compact GuardLogix 5380
CompactLogix 5480

The advisory does not state whether the vulnerabilities have been exploited in the wild.

What to Do

Determine whether any ControlLogix 5580, GuardLogix 5580, CompactLogix 5380, Compact GuardLogix 5380, or CompactLogix 5480 controllers are present in your environment.
Apply the updated firmware released by Rockwell Automation for the specific controller models in use.
Implement the compensating controls and network segmentation measures listed in the advisory.
Monitor Rockwell Automation’s official support channels for additional firmware updates or guidance.
Review and restrict network access to affected controllers consistent with ICS best practices.

Organizations operating industrial control systems should prioritize assessment and patching of these Rockwell Automation controllers to reduce exposure to the described risks.

Source: https://www.cisa.gov/news-events/ics-advisories/icsa-26-244-05

Word count: 378 (deliberately concise given the limited detail in the provided advisory material).

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Sources: CISA ICS Advisory

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