The web management portal on the SMC SMCD3G-CCR (aka Comcast Business Gateway) with firmware before 1.4.0.49.2 uses predictable session IDs based on time values, which makes it easier for remote attackers to hijack sessions via a brute-force attack on the userid cookie.

Multiple cross-site request forgery (CSRF) vulnerabilities in the web interface on the SMC SMCD3G-CCR (aka Comcast Business Gateway) with firmware before 1.4.0.49.2 allow remote attackers to (1) hijack the intranet connectivity of arbitrary users for requests that perform a login via goform/login, or hijack the authentication of administrators for requests that (2) enable external logins via an mso_remote_enable action to goform/RemoteRange or (3) change DNS settings via a manual_dns_enable action to goform/Basic.

A certain Comcast Business Gateway configuration of the SMC SMCD3G-CCR with firmware before 1.4.0.49.2 has a default password of D0nt4g3tme for the mso account, which makes it easier for remote attackers to obtain administrative access via the (1) web interface or (2) TELNET interface.

SMC Wireless Router model SMC7904WBRA allows remote attackers to cause a denial of service (reboot) by flooding the router with traffic.

SMC routers SMC7004VWBR running firmware 1.00.014 and SMC7008ABR EU running firmware 1.42.003 allow remote attackers to bypass authentication by connecting to it from the same IP address as the administrator who is logged in, then accessing the setup_status.htm or status.HTM pages.

SMC Barricade broadband router 7008ABR and 7004VBR enable remote administration by default, which allows remote attackers to gain access by connecting to port 1900.

SMC Networks Barricade Wireless Cable/DSL Broadband Router SMC7004VWBR allows remote attackers to cause a denial of service via certain packets to PPTP port 1723 on the internal interface.