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.
Vulnerability in AIX 4.1.4 and HP-UX 10.01 and 9.05 allows local users to cause a denial of service (crash) by using a socket to connect to a port on the localhost, calling shutdown to clear the socket, then using the same socket to connect to a different port on localhost.