Certain HP DeskJet All in One devices
may be vulnerable to remote code execution caused by a buffer overflow when
specially crafted Web Services for Devices (WSD) scan requests are improperly
validated and handled by the MFP.

WSD
Scan is a Microsoft Windows–based network scanning protocol that allows a PC to
discover scanners (and MFPs) on a network and send scan jobs to them without
requiring vendor specific drivers or utilities.