The Tenda AC23 is a capable budget router hampered by a history of insecure coding practices within its httpd firmware binary. The prevalence of and Buffer Overflow vulnerabilities makes it a common target in IoT security research and botnet recruitment. Users are strongly advised to keep the device updated and restrict network access to the administrative interface.
Buffer overflow in saveParentControlInfo allows remote code execution. tenda ac23 firmware
If it is a .zip file, extract the .bin file to your desktop. Log into the Tenda AC23 web interface. Go to System Settings > Firmware Upgrade. Select Local Upgrade. The Tenda AC23 is a capable budget router