– firmware images are not signed, but malicious .swi files can brick the device.
HP typically releases critical security updates quarterly and feature updates biannually. However, for a discontinued product line, updates become less frequent—usually only for major vulnerabilities. hp j8013e firmware
Look for the HP Jetdirect section. The firmware version for the J8013E often starts with a prefix like V.38 or higher. – firmware images are not signed, but malicious