Under dual correlated Rician fading and unknown wiretapper’s channel state information, secrecy outage probability (SOP) is theoretically studied for the first time in this paper. The signal-to-noise ratio probability density function of bivariate correlated Rician fading is derived. Using an infinite-summation form for the modified Bessel functions of the first kind, compact expressions for the SOP are obtained. The new findings generalise the current findings under dual correlated Rayleigh fading, and advance theoretical developments for wireless secrecy under correlated fading. Simulation results are given, which are shown to match theoretical prediction. Detailed discussions are also given.