Ensure printer firmware is current and only signed firmware can be installed

檢查方式

稽核方法: 人工審核

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In the Embedded Web Server (EWS: browse to https://<printer-ip>/ and sign in as administrator; HP: Security / Networking tabs, Xerox: Properties > Security / Connectivity, Ricoh: Device Management > Configuration, Canon: Settings/Registration > Network Settings / Security Settings): read the firmware version (HP: Information > Configuration Page / Firmware Upgrade; Xerox: Properties > General Setup > Configuration Report) and compare it with the latest release and security bulletins on the vendor support site. Confirm firmware signature verification / whitelisting is on (e.g. HP Code Signing / Sure Start, Xerox firmware verification, 'Allow firmware upgrade via PJL/print job' disabled) and that remote firmware upgrade is restricted to administrators.

修補方式

修補方法: 操作指南或基礎設施修補檔

Download the current firmware from the vendor support portal, verify its checksum/signature, and install via EWS (Firmware Upgrade) or fleet tooling during a maintenance window. Disable firmware upgrade via print jobs (PJL/port 9100) and enable signed-firmware enforcement.