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CVE-2026-9637: CompactLogix® 5380 / ControlLogix® 5580 - Multiple Vulnerabilities

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-01 · updated 2026-09-01
• Weakness: CWE-119

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

• Rockwell Automation CompactLogix® 5380 / ControlLogix® 5580: V33 and prior, V34.011-V34.014, V35.011-V35.013, V36.011-V36.012

References

• https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1792.html

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