VULNERABILITY DETAILS
Saved passwords can be seen without entering the password of the Windows account

VERSION
Chrome Version: 51.0.2704.29 beta-m (64-bit)
Operating System: Windows 7 64 bit SP1, with automatic login for a user with administrative rights 

REPRODUCTION CASE
After restarting the computer, starting up Chrome immediately and opening settings/passwords, the saved passwords can be shown for a minute or two without being asked for the password of the Windows account. I could reproduce the issue several times after restarting the computer.

Chrome Extensions in use:
- AdBlock v2.56
- Application Launcher for Drive (by Google) v3.2
- Chromium Wheel Smooth Scroller v1.4.1
- Google Docs Offline v1.4
- Speed Dial 2 v2.1.2

Automatically starting Windows apps:
- Avast
- Comodo
- Tobii EyeX
- Logitech Gaming Software
- AMD Radeon Settings
- ASUS GPU Tweak