CVE Feed

    Dashboard / CVE / CVE-2026-9636

    CVE-2026-9636

    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issue stems from the controller failing to properly reject certificates signed by an intermediate certificate that has been revoked via a Certificate Revocation List (CRL).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:Jul 14, 2026
    Last Modified:Nov 11, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00216
    CVSS Score:8.2

    Affected Products

    Vendor
    Rockwellautomation
    Product
    1756-en4tr
    Vendor
    Rockwellautomation
    Product
    Compact Guardlogix 5380
    Vendor
    Rockwellautomation
    Product
    Compactlogix 5380
    Vendor
    Rockwellautomation
    Product
    Controllogix 5580
    Vendor
    Rockwellautomation
    Product
    Guardlogix 5580

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High