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.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53772
http://www.vupen.com/english/advisories/2009/2915
http://www.securityfocus.com/bid/36675
http://www.cisco.com/en/US/products/products_security_advisory09186a0080afc930.shtml