If you have any HP Laser Jet Products that are based on FutureSmart, ie M4555, M601/602/603 M552, etc, (virtually any model that supports firmware upgrades directly from a USB stick) there was a firmware update released in the past couple of days to address a security Vulnerability.
I was hoping it was the new FutureSmart 4 upgrade but all it addresses is the vulnerability.
Download firmware from support.hp.com