This case study describes how a multinational hotel chain strengthened security for networked printers and other cyber-physical systems used across thousands of properties. Default passwords, vulnerable firmware, expired certificates, open ports, and insecure configurations exposed these devices to ransomware, data theft, and operational disruption. Phosphorus provided an agentless platform for rapid discovery, vulnerability assessment, credential rotation, firmware upgrades or downgrades, certificate management, and configuration hardening. The solution delivered immediate asset visibility, automated remediation, faster incident resolution, and stronger compliance with credential-management practices. By reducing manual device administration, the security team could focus on higher-priori

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