CVE-2026-9637

HIGHCVSS 8.7/10

Last modified

CVE-2026-9637 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. A denial-of-service security issue exists in the affected Logix platforms listed in the table above. The security issue stems from improper validation of input length during CIP message processing.

Description

A denial-of-service security issue exists in the affected Logix platforms listed in the table above. The security issue stems from improper validation of input length during CIP message processing. This can result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Rockwell AutomationCompactLogix® 5380 / ControlLogix® 5580V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-9637?
A denial-of-service security issue exists in the affected Logix platforms listed in the table above. The security issue stems from improper validation of input length during CIP message processing. This can result in a major nonrecoverable fault (MNRF), requiring a power cycle to recover
How severe is CVE-2026-9637?
CVE-2026-9637 has a CVSS score of 8.7/10 (HIGH severity).
How do I fix CVE-2026-9637?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST