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Lexmark XM9155

Lexmark XM9155

Unsecured Printers Are Susceptible to Hacker Attacks If They Are Directly Accessible From the Internet (2/10/2016)

What you will see

Print jobs not initiated by you or other known users.

For example: "stackoverflowin the hacker..."

Affected products

Any printer or MFP connected directly connected to an external network such as the Internet.


Is your printer connected to a router?


Connect your device to a router and enable the router's firewall. Contact your router manufacturer if you need help connecting the printer and enabling the firewall.


Check that the router's firewall is activated. Contact your router manufacturer if you need help enabling the firewall.

A firewall will help protect or shield your device from external access over the Internet.

Your printer is connected to a router with an enabled firewall

Check whether your router's DMZ is enabled and your printer's IP address/hostname is configured as a DMZ host. If so, then your printer can be accessible to anyone on the Internet. Contact your router manufacturer should you need help removing your printer from the DMZ.


A network connected printer/MFP that is not behind a firewall, or is in a DMZ, is not secured and potentially exposed to direct access from an unauthorized user.

Still need help?

If you require additional assistance, please close this window and locate

Get In Touch with Lexmark! for contact information.
When calling for support, you will need your printer model/machine type and serial number (SN).

Please be near the affected products relating this topic in order to expedite the support process and reduce callbacks.


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