A buffer overflow in the formSetCfm() function of Tenda AC1206 1200M 11ac US_AC1206V1.0RTL_V15.03.06.23_multi_TD01 allows attackers to cause a Denial of Service (DoS) via a crafted POST request.
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).