CVE-2020-20221: MikroTik RouterOS

Medium severity, CVSS 6.5. EPSS: 2.9% chance of exploitation in the next 30 days.

Mikrotik RouterOs before 6.44.6 (long-term tree) suffers from an uncontrolled resource consumption vulnerability in the /nova/bin/cerm process. An authenticated remote attacker can cause a Denial of Service due to overloading the systems CPU.

Affected products

• MikroTik RouterOS: before 6.44.6 (fixed in 6.44.6)

Published 2021-07-21. Last modified 2026-06-17.