A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1, specifically in the handling of the wans parameter in the qos.asp endpoint.
https://www.dlink.com/en/security-bulletin/
https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10505
https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md