Novell NetWare 5.0 allows remote attackers to cause a denial of service by flooding port 40193 with random data.
Novell Netware 5.0 through 5.1 may allow local users to gain "Domain Admin" rights by logging into a Novell Directory Services (NDS) account, and executing "net use" on an NDSADM account that is not in the NT domain but has domain access rights, which allows the user to enter a null password.