A vulnerability of authentication bypass has been found on a Zebra Technologies ZTC ZT410-203dpi ZPL printer. This vulnerability allows an attacker that is in the same network as the printer, to change the username and password for the Web Page by sending a specially crafted POST request to the setvarsResults.cgi file. For this vulnerability to be exploitable, the printers protected mode must be disabled.

Zebra Industrial Printers All Versions, Zebra printers are shipped with unrestricted end-user access to front panel options. If the option to use a passcode to limit the functionality of the front panel is applied, specially crafted packets could be sent over the same network to a port on the printer and the printer will respond with an array of information that includes the front panel passcode for the printer. Once the passcode is retrieved, an attacker must have physical access to the front panel of the printer to enter the passcode to access the full functionality of the front panel.