Mikrotik RouterOs before 6.47 (stable tree) suffers from an uncontrolled resource consumption vulnerability in the /nova/bin/route process. An authenticated remote attacker can cause a Denial of Service due to overloading the systems CPU.
https://github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20217/README.md