In Tenda G3 US_G3V3.0br_V15.11.0.6(7663)_EN_TDE, there is a buffer overflow vulnerability caused by sprintf in function in the httpd binary.
https://www.tendacn.com/download/detail-3401.html
https://github.com/Davidteeri/Bug-Report/blob/main/tenda-G3-%200x53208.md