According to neurogadget, Pangu is having a very difficult time properly jailbreaking iOS 10.
Due to major issues with Cydia working properly, Pangu was forced to scrap their entire jailbreak tool. Apples security seems to have done a fairly decent job keeping the jailbreakers at bay. Do not give up hope. Pangu, TaiG or Other hackers are still working on ways to jailbreak.
I personally believe that iOS 10 will be jailbroken. Just "when?", is always the question.
Soruce: iOS 10 Jailbreak Pangu: The Outlook Is Bleak - Neurogadget