Cisco Unity Connection (UC) 7.1, 8.0, and 8.5 allows remote authenticated users to cause a denial of service (resource consumption and administration outage) via extended use of the product, aka Bug ID CSCtd79132.
Cisco Unity Connection before 7.1.3b(Su2) allows remote authenticated users to change the administrative password by leveraging the Help Desk Administrator role, aka Bug ID CSCtd45141.
Cisco Unity Connection before 7.1.5b(Su5), 8.0 and 8.5 before 8.5.1(Su3), and 8.6 before 8.6.2 allows remote attackers to cause a denial of service (services crash) via a series of crafted TCP segments, aka Bug ID CSCtq67899.