SimpliSafe wireless home alarm systems used by more than 300,000 customers in the United States are Hell Easy to Hack. Hack allows an attacker to easily gain full access to the alarm and disable the security system, facilitating unauthorized intrusions and thefts. Hackers can harvest alarm’s PIN and turn alarm OFF at a distance of up to 200 yards (30 meters) away from the alarm control box when the house owner deactivates the alarm. The attacker then records the PIN code on the microcontroller board’s memory (RAM) and later replay this PIN code to disable the compromised alarm.
Source: https://thehackernews.com/2016/02/hack-home-security-alarm.html