If you own an HP multi-function device (MFD), and use the fax capability, you should immediately install the latest firmware update.
It turns out that the fax functionality in HP devices has a bug. If someone sends you a maliciously crafted fax, they can take over your printer and use it to get to the rest of your home network. A few points to note:
- If you do not plug your printer into the phone line, then you are not affected by this.
- Regardless of whether you are affected, you should download the latest firmware to ensure your continued security.
- Many of the affected devices can be set to auto-update. I had mine set, and it did.
- If your device is not set to auto-update - or if you are unsure - you can find patches for the vulnerability on the HP website.