On certain TOTOLINK Realtek SDK based routers, an authenticated attacker may execute arbitrary OS commands via the sysCmd parameter to the boafrm/formSysCmd URI, even if the GUI (syscmd.htm) is not available. This allows for full control over the device's internals. This affects A3002RU through 2.0.0, A702R through 2.1.3, N301RT through 2.1.6, N302R through 3.4.0, N300RT through 3.4.0, N200RE through 4.0.0, N150RT through 3.4.0, N100RE through 3.4.0, and N302RE 2.0.2.

System command injection in formAliasIp in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "subnet" POST parameter.

System command injection in formDlna in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "ftpUser" POST parameter.

System command injection in fromNtp in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "ntpServerIp2" POST parameter. Certain payloads cause the device to become permanently inoperable.

System command injection in formAliasIp in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "ipAddr" POST parameter.

Incorrect access control in formPasswordSetup in TOTOLINK A3002RU version 1.0.8 allows attackers to change the admin user's password via an unauthenticated POST request.

Cross-site scripting in notice_gen.htm in TOTOLINK A3002RU version 1.0.8 allows attackers to execute arbitrary JavaScript by modifying the "Input your notice URL" field.

Cross-site scripting in password.htm in TOTOLINK A3002RU version 1.0.8 allows attackers to execute arbitrary JavaScript via the user's password.

Cross-site scripting in notice_gen.htm in TOTOLINK A3002RU version 1.0.8 allows attackers to execute arbitrary JavaScript by modifying the "User phrases button" field.

Password disclosure in password.htm in TOTOLINK A3002RU version 1.0.8 allows attackers to obtain the plaintext password for the admin user by making a GET request for password.htm.