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Description

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issue stems from the controller failing to properly reject certificates signed by an intermediate certificate that has been revoked via a Certificate Revocation List (CRL).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.

PUBLISHED Reserved 2026-05-26 | Published 2026-07-14 | Updated 2026-07-14 | Assigner Rockwell




HIGH: 8.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-299 Improper check for certificate revocation

Product status

Default status
unaffected

Version 36 - Version 37
affected

References

www.rockwellautomation.com/...dvisories/advisory.SD1788.html

cve.org (CVE-2026-9636)

nvd.nist.gov (CVE-2026-9636)

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