Adobe has released Flash Player version 18.104.22.168, available from here.
This is a scheduled update, which includes bug fixes, new features, and addresses 17 security vulnerabilities.
It fixes nine bugs, including an unexpected quit when trying to play certain Flash files. It also brings support for spherical video, and finer-grained control over camera and microphone data, which is accessible in the Global settings Manager.
Security updates include some critical vulnerabilities which could lead to code execution, and one is a security bypass vulnerability. From these alone, the update is essential and urgent.