Cross Site Scripting vulnerability in Teldats Router RS123, RS123w allows attacker to execute arbitrary code via the cmdcookie parameter to the upgrade/query.php page.
https://github.com/uyhacked/Teldat-s-Router/blob/main/Teldat%27s%20Router%20Vulnerability.md
https://github.com/uyhacked/Teldat-s-Router/blob/main/Teldat