Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compromise the storage zones controller.
https://www.secureworks.com/research/gold-melody-profile-of-an-initial-access-broker?&web_view=true
https://www.tenable.com/cyber-exposure/a-look-inside-the-ransomware-ecosystem
https://www.crowdstrike.com/blog/prophet-spider-exploits-citrix-sharefile/