The management web interface in Alcatel-Lucent OmniSwitch 6450, 6250, 6850E, 9000E, 6400, and 6855 with firmware before 6.6.4.309.R01 and 6.6.5.x before 6.6.5.80.R02 generates weak session identifiers, which allows remote attackers to hijack arbitrary sessions via a brute force attack.

Cross-site request forgery (CSRF) vulnerability in sec/content/sec_asa_users_local_db_add.html in the management web interface in Alcatel-Lucent OmniSwitch 6450, 6250, 6850E, 9000E, 6400, 6855, 6900, 10K, and 6860 with firmware 6.4.5.R02, 6.4.6.R01, 6.6.4.R01, 6.6.5.R02, 7.3.2.R01, 7.3.3.R01, 7.3.4.R01, and 8.1.1.R01 allows remote attackers to hijack the authentication of administrators for requests that create users via a crafted request.

Alcatel OmniSwitch 7000 and 7800 allows remote attackers to cause a denial of service (reboot) via certain network scans, as demonstrated using a Nessus port scan of ports 1 through 1024 with safe-checks disabled.

Xylan OmniSwitch before 3.2.6 allows remote attackers to bypass the login prompt via a CTRL-D (control d) character, which locks other users out of the switch because it only supports one session at a time.