The ZeroNights 2021 Call For Papers has been announced. It will be held in Saint-Petersburg, Russia on June 30th, 2021.
You can download it from the following link: https://packetstormsecurity.com/files/download/162146/zeronights2021-ftp.txt
Source: https://packetstormsecurity.com/files/162146/ZeroNights-2021-Call-For-Papers.html