Broadcom based cable modems across multiple vendors are vulnerable to a buffer overflow, which allows a remote attacker to execute arbitrary code at the kernel level via JavaScript run in a victim's browser. Examples of affected products include Sagemcom F@st 3890 prior to 50.10.21_T4, Sagemcom F@st 3890 prior to 05.76.6.3f, Sagemcom F@st 3686 3.428.0, Sagemcom F@st 3686 4.83.0, NETGEAR CG3700EMR 2.01.05, NETGEAR CG3700EMR 2.01.03, NETGEAR C6250EMR 2.01.05, NETGEAR C6250EMR 2.01.03, Technicolor TC7230 STEB 01.25, COMPAL 7284E 5.510.5.11, and COMPAL 7486E 5.510.5.11.

The web interface of the Compal Broadband CH7465LG modem (version CH7465LG-NCIP-6.12.18.25-2p6-NOSH) is vulnerable to a /%2f/ path traversal attack, which can be exploited in order to test for the existence of a file pathname outside of the web root directory. If a file exists but is not part of the product, there is a 404 error. If a file does not exist, there is a 302 redirect to index.html.

The setter.xml component of the Common Gateway Interface on Compal CH7465LG 6.12.18.25-2p4 devices does not properly validate ping command arguments, which allows remote authenticated users to execute OS commands as root via shell metacharacters in the Target_IP parameter.

Compal CH7465LG CH7465LG-NCIP-6.12.18.24-5p8-NOSH devices have Incorrect Access Control because of Improper Input Validation. The attacker can send a maliciously modified POST (HTTP) request containing shell commands, which will be executed on the device, to an backend API endpoint of the cable modem.