iPhone 6s and 6s Plus running the latest iOS version are plagued by a vulnerability that can be exploited to bypass the lockscreen. The vulnerability was discovered by the security firm Vulnerability Lab which reported the issue to Apple in mid-March. The security risk of the passcode bypass vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.1. Attackers can access data stored on a locked phone by using Siri (Speech Interpretation and Recognition Interface) assistant.”]
Source: https://securityaffairs.co/wordpress/46031/mobile-2/bypass-iphone-6s-lockscreen.html