The HTTP server in the Thomson TWC305, TWC315, and TCW690 cable modem ST42.03.0a allows remote attackers to cause a denial of service (unstable service) via a long GET request, possibly caused by a buffer overflow.
The RgSecurity form in the HTTP server for the Thomson TCW690 cable modem running firmware 2.1 and software ST42.03.0a does not properly validate the password before performing changes, which allows remote attackers on the LAN to gain access via a direct POST request.