Provide references for CVE-2021-43039.
Where can I find more information about CVE-2021-43039?
References are available at: https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961, https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1, https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2.