Persistent Cross-Site Scripting (XSS) in the advancedsetup_websiteblocking.html Website Blocking page of the Actiontec C1000A router with firmware through CAC004-31.30L.95 allows a remote attacker to inject arbitrary HTML into the Website Blocking page by inserting arbitrary HTML into the 'TodUrlAdd' URL parameter in a /urlfilter.cmd POST request.

An issue was discovered on Actiontec WCB6200Q before 1.1.10.20a devices. The admin login session cookie is insecurely generated making admin session hijacking possible. When an admin logs in, a session cookie is generated using the time of day rounded to 10ms. Since the web server returns its current time of day in responses, it is possible to step backward through possible session values until a working one is found. Once a working session ID is found, an attacker then has admin control of the device and can add a secondary SSID to create a backdoor to the network.

Actiontec GT784WN modems with firmware before NCS01-1.0.13 have hardcoded credentials, which makes it easier for remote attackers to obtain root access by connecting to the web administration interface.

Cross-site request forgery (CSRF) vulnerability on Actiontec GT784WN modems with firmware before NCS01-1.0.13 allows remote attackers to hijack the authentication or intranet connectivity of arbitrary users.