HP-UX 9.x and 10.x running X windows may allow local attackers to gain privileges via (1) vuefile, (2) vuepad, (3) dtfile, or (4) dtpad, which do not authenticate users.
Character-Terminal User Environment (CUE) in HP-UX 11.0 and earlier allows local users to overwrite arbitrary files and gain root privileges via a symlink attack on the IOERROR.mytty file.