D-Link DIR-816 A2 1.10 B05 was discovered to contain a command injection vulnerability via the component /goform/Diagnosis.
https://www.dlink.com/en/security-bulletin/
https://github.com/mmmmmx1/dlink/blob/main/DIR-816/readme.md
http://www.dlink.com.cn/techsupport/ProductInfo.aspx?m=DIR-816