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Rockwell Automation FactoryTalk Optix MQTT RCE Vulnerability

⚠️ Rockwell Automation disclosed an input-validation defect in the FactoryTalk Optix MQTT broker that can enable remote code execution by loading remote Mosquitto plugins due to lack of URI sanitization. The issue affects versions 1.5.0 through 1.5.7; Rockwell recommends upgrading to 1.6.0 or later. CISA assigned CVE-2025-9161, reports a CVSS v4 base score of 7.3, and advises network segmentation and access restrictions; no public exploitation has been reported.