Enterasys Vertical Horizon VH-2402S before firmware 2.05.05.09 has a hard-coded account and password for debugging, which allows remote attackers to gain privileges.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-2028
http://www.enterasys.com/support/relnotes/VH-4802-2050509-patch-rel.pdf