HP patches printer firmware flaw, but leaves customers guessing

There's a serious security vulnerability on some HP LaserJet printers.

The good news is that it's been patched. The bad news is that you don't know if your HP LaserJet printer needs the fix - because HP hasn't told you.

Late last year, owners of HP LaserJet printers were warned that their confidential data could be at risk, because of a security vulnerability in the devices. Researchers at Columbia University demonstrated to reporters that it was possible for remote hackers to install malicious firmware on certain HP printers, without the owner necessarily realising that they were under attack.