An issue was discovered on Tenda AC15 devices. A remote, unauthenticated attacker can make a request to /goform/telnet, creating a telnetd service on the device. This service is password protected; however, several default accounts exist on the device that are root accounts, which can be used to log in.
The product initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Ac15_firmware | Tendacn | - (including) | - (including) |
Developers often choose default values that leave the product as open and easy to use as possible out-of-the-box, under the assumption that the administrator can (or should) change the default value. However, this ease-of-use comes at a cost when the default is insecure and the administrator does not change it.