Secure multi-path routing is a critical issue in security management of WMNs due to its multi-hop nature as each node takes part in routing mechanism making it prone to routing attacks. Security management mechanisms are armed with features such as asymmetric cryptography which are costly in term of computations, transmissions and time delays. In this paper, we propose a security management mechanism for multi-path routing which efficiently uses the characteristics of WMNs, mutual authentication and secrete key cryptography to provide secure multi-path route management. Our management scheme takes less overhead than the available secure multi-path routing mechanisms. Simulation analyses and the performance of the mechanism are presented in support of the proposal.