Vulnerability · Published Sep 1, 2026 · Assigned by Rockwell
CVE-2026-9637CompactLogix® 5380 / ControlLogix® 5580 - Multiple Vulnerabilities
High 8.7
In plain English
A high-severity memory corruption in CompactLogix® 5380 / ControlLogix® 5580 from Rockwell Automation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.4%top 62.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Rockwell Automation | CompactLogix® 5380 / ControlLogix® 5580 | V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012 |
Weakness: CWE-119 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N