CVE-2016-3749
server/LockSettingsService.java in LockSettingsService in Android 6.x before 2016-07-01 allows attackers to modify the screen-lock password or pattern via a crafted application, aka internal bug 28163930.
Date published : 2016-07-10
http://source.android.com/security/bulletin/2016-07-01.html
https://android.googlesource.com/platform/frameworks/base/+/e83f0f6a5a6f35323f5367f99c8e287c440f33f5