The TimesTenD process in Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4) allows remote attackers to cause a denial of service (process crash) via a large number of TCP connections to ports 16200 and 22794, aka Bug ID CSCsy17662.
The Presence Engine (PE) service in Cisco Unified Presence before 6.0(1) allows remote attackers to cause a denial of service (core dump and service interruption) via malformed packets, aka Bug ID CSCsh50164.