The two exploits were meant for OS X Snow Leopard and OS X Lion, so your modern Mac running the latest version of macOS shouldn’t be in danger.
Vault 7
Encrypting Email on the Mac Is Surprisingly Easy
Now that we’re thinking about privacy and the security of our computers and mobile devices again, we’re worried about encrypting email. Jeff Butts is here to set your mind at ease that email encryption is alive and well, and surprisingly easy to do on the Mac.