CVE-2026-9637
High
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
SeverityHigh
CVSS8.7
Exploit probability—
ProductCompactLogix® 5380 / ControlLogix® 5580
PublishedSep 1, 2026
First seenSep 1, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Rockwell Automation CompactLogix® 5380 / ControlLogix® 5580 | V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012 | — |
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