The evad3rs team has released the untethered jailbreak for different Apple devices running running iOS version from 7.0 to 7.4.4. Device jailbreak allows removal of the limitations designed by manufacturer, the procedure is usually possible through the use of software and hardware exploits. Jailbreaking permits root access to the iOS operating system, the operation allows the download of additional applications, extensions, and themes that are unavailable through the official Apple App Store. In the US since 2010 a rule was passed by the US government made it legal: “Under the Digital Millennium Copyright Act, jailbreaking iPhones is legal in the United States””]
Source: https://securityaffairs.co/wordpress/20688/hacking/ios-7-untethered-jailbreak-available.html