A study conducted by HPs Fortify on security features implemented by Smartwatches revealed that not even a single device found to be 100 percent safe. Almost every Smartwatch available on the market is vulnerable to cyber attack, including the popular Apple Watch and Samsung Gear. Three out of ten smartwatches lacked to implement Two-Factor authentication, or the ability to lock accounts after 3 to 5 failed password attempts exposing users to data harvesting. HP has verified the presence of vulnerabilities listed on the OWASP Internet of Things Top 10, 100 percent of wearable devices contained at least one security issue.”]
Source: https://securityaffairs.co/wordpress/38837/hacking/smartwatches-hp-study.html