Unknown group of hackers has sold a zero-day vulnerability to Zerodium, a startup by French-based company Vupen that Buys and Sells exploits. Hackers can now remotely hack your iPhone running the latest version of iOS, i.e. iOS 9.1/9.2b Jailbreak (untethered) Exploit. The same exploit can allow them to install any app they want with full privileges i.E. Spyware, Malware or Surveillance software. The chances are high that the firm will resell the newly discovered and undisclosed remote iOS jailbreak exploit.
Source: https://thehackernews.com/2015/11/ios9-zero-day-hack.html