Yes, wireless, self-monitored alarm systems are at risk of being hacked. A wired alarm system that is not connected to the internet cannot be hacked as easily, but is still at risk for other attacks as no security system is 100% secure. One major benefit to hiring an alarm monitoring service is the added peace of mind against hackers. Security professionals are trained to monitor for these risks. If a hack occurs, your security provided can diagnose the situation, contact local authorities, and implement any necessary technology upgrades.