An issue was discovered on GL.iNet devices through 4.5.0. Attackers can invoke the add_user interface in the system module to gain root privileges. This affects A1300 4.4.6, AX1800 4.4.6, AXT1800 4.4.6, MT3000 4.4.6, MT2500 4.4.6, MT6000 4.5.0, MT1300 4.3.7, MT300N-V2 4.3.7, AR750S 4.3.7, AR750 4.3.7, AR300M 4.3.7, and B1300 4.3.7.

An issue was discovered on GL.iNet devices through 4.5.0. Attackers who are able to steal the AdminToken cookie can execute arbitrary code by uploading a crontab-formatted file to a specific directory and waiting for its execution. This affects A1300 4.4.6, AX1800 4.4.6, AXT1800 4.4.6, MT3000 4.4.6, MT2500 4.4.6, MT6000 4.5.0, MT1300 4.3.7, MT300N-V2 4.3.7, AR750S 4.3.7, AR750 4.3.7, AR300M 4.3.7, and B1300 4.3.7.

Insecure Permissions vulnerability in GL.iNet AX1800 version 4.0.0 before 4.5.0 allows a remote attacker to execute arbitrary code via the upload API function.

Insecure Permissions vulnerability in GL.iNet AX1800 version 4.0.0 before 4.5.0 allows a remote attacker to execute arbitrary code via a crafted script to the gl_nas_sys authentication function.

Insecure Permissions vulnerability in GL.iNet AX1800 v.3.215 and before allows a remote attacker to execute arbitrary code via the file sharing function.

An issue was discovered on GL.iNet devices before 3.216. The function guci2_get() found in libglutil.so has a buffer overflow when an item is requested from a UCI context, and the value is pasted into a char pointer to a buffer without checking the size of the buffer.

An issue was discovered on GL.iNet devices before 3.216. There is an arbitrary file write in which an empty file can be created anywhere on the filesystem. This is caused by a command injection vulnerability with a filter applied. Through the software installation feature, it is possible to inject arbitrary parameters in a request to cause opkg to read an arbitrary file name while using root privileges. The -f option can be used with a configuration file.

A path traversal issue was discovered on GL.iNet devices before 3.216. Through the file sharing feature, it is possible to share an arbitrary directory, such as /tmp or /etc, because there is no server-side restriction to limit sharing to the USB path.

An issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to install arbitrary software, such as a reverse shell, because the restrictions on the available package list are limited to client-side verification. It is possible to install software from the filesystem, the package list, or a URL.

An issue was discovered on GL.iNet devices before 3.216. An API endpoint reveals information about the Wi-Fi configuration, including the SSID and key.