Cisco DTA Control System (DTACS) 4.0.0.9 and Cisco Headend System Release allow remote attackers to cause a denial of service (CPU and memory consumption and TCP service outage) via (1) a SYN flood or (2) another type of TCP traffic flood aka Bug IDs CSCus50642 CSCus50662 CSCus50625 CSCus50657 and CSCus68315.