Websense TRITON AP-WEB before 8.0.0 allows remote attackers to enumerate Windows domain user accounts via vectors related to HTTP authentication.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-2852
http://www.websense.com/support/article/kbarticle/Vulnerabilities-resolved-in-TRITON-APX-Version-8-0