Status: UPDATED
| Advisory ID: CVE-2026-9636
Key Details
| CVE | CVE-2026-9636 |
| CVSS Score / Version | 8.2 (High) / CVSS v4.0 |
| Updated | 2026-07-14 |
| Affected products | Rockwell Automation ControlLogix® 5580, CompactLogix® 5380, GuardLogix® 5580, Compact GuardLogix® 5380, 1756-EN4TR |
| Classified as | CWE-299 (Improper Check for Certificate Revocation) |
Affected Products, Subsystems & Sectors
| Subsystems | General OT |
| Sectors | Multiple |
What to Know
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issue stems from the controller failing to properly reject certificates signed by an intermediate certificate that has been revoked via a Certificate Revocation List (CRL).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. (NVD)
What to Do
Monitor Rockwell Automation's web page for any future patch releases.
References