According to Essential, who posted the update on Twitter this Monday, it would appear that the software update tagged as build NMJ20D patches the well-known KRACK (Key Reinstallation Attack) security vulnerability discovered in the WPA2 Wi-Fi protocol by security researcher Mathy Vanhoef. The WPA2 KRACK bug makes any device that connects to the Internet and uses the WPA2 security protocol at risk of attacks. Hackers can use this critical vulnerability to monitor your network traffic and steal your credit card information, as well as other sensitive data like passwords and usernames.