The default configuration of the PJL Access value in the File System External Access settings on HP LaserJet MFP printers, Color LaserJet MFP printers, and LaserJet 4100, 4200, 4300, 5100, 8150, and 9000 printers enables PJL commands that use the device's filesystem, which allows remote attackers to read arbitrary files via a command inside a print job, as demonstrated by a directory traversal attack.

Multiple cross-site request forgery (CSRF) vulnerabilities in the HP Embedded Web Server (EWS) on HP LaserJet Printers, Edgeline Printers, and Digital Senders allow remote attackers to hijack the intranet connectivity of arbitrary users for requests that (1) print documents via unknown vectors, (2) modify the network configuration via a NetIPChange request to hp/device/config_result_YesNo.html/config, or (3) change the password via the Password and ConfirmPassword parameters to hp/device/set_config_password.html/config.

The HP Embedded Web Server (EWS) on HP LaserJet Printers, Edgeline Printers, and Digital Senders has no management password by default, which makes it easier for remote attackers to obtain access.

The PML Driver HPZ12 (HPZipm12.exe) in the HP all-in-one drivers, as used by multiple HP products, uses insecure SERVICE_CHANGE_CONFIG DACL permissions, which allows local users to gain privileges and execute arbitrary programs, as demonstrated by modifying the binpath argument, a related issue to CVE-2006-0023.

Multiple buffer overflows in FTP Print Server 2.4 and 2.4.5 in HP LaserJet 5000 Series printers with firmware R.25.15 or R.25.47, and HP LaserJet 5100 Series printers with firmware V.29.12, allow remote attackers to cause a denial of service (device crash) via a long string in the (1) LIST or (2) NLST command.