← CVE Intelligence

CVE-2026-9636

Rockwell Automation CompactLogix® 5380 ControlLogix® 5580 / 1756-EN4 Communications Module – Certificate Revocation List Vulnerability PUBLISHED

Description (CNA)

A security issue exists within CompactLogix® 5380, ControlLogix® 5580, and EN4 communication modules related to CIP Security certificate revocation handling. The security issue stems from the controller failing to properly reject certificates signed by an intermediate certificate that has been revoked via a Certificate Revocation List (CRL). This could allow a network-based attacker to establish a connection using a certificate that should be untrusted, potentially bypassing CIP Security protections.

Affected (CNA)

Vendor / productVersions
Rockwell Automation / ControlLogix® 5580, CompactLogix® 5380, GuardLogix® 5580, Compact GuardLogix® 5380, 1756-EN4TRaffected Version 36 - Version 37

CWE

CWE-299

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.