CVE-2020-20266: MikroTik RouterOS

Medium severity, CVSS 6.5. EPSS: 2.1% chance of exploitation in the next 30 days.

Mikrotik RouterOs before 6.47 (stable tree) suffers from a memory corruption vulnerability in the /nova/bin/dot1x process. An authenticated remote attacker can cause a Denial of Service (NULL pointer dereference).

Affected products

• MikroTik RouterOS: before 6.47 (fixed in 6.47)

Published 2021-05-19. Last modified 2026-06-17.