Is DEHP a kind of Multivariate hard problem?

[smslca]

Please correct me if I am wrong. To my understanding , given a '$m$' multivariate set of equations in '$n$' variables in a integer field '$F$' is hard to solve, even in case of $MQ(multiquadratic)$ usually with field having characteristic as '$2$'. Where in case of $DEHP(Diophatine Equation Hard Problem)$ , it is a multivariate congruence with odd modulo field.
I would like to know that , is DEHP a case of multivariate hard problem with some large odd characteristic and a single equation.