CVE-2018-5951: MikroTik RouterOS

High severity, CVSS 7.5. EPSS: 4.3% chance of exploitation in the next 30 days.

An issue was discovered in Mikrotik RouterOS. Crafting a packet that has a size of 1 byte and sending it to an IPv6 address of a RouterOS box with IP Protocol 97 will cause RouterOS to reboot imminently. All versions of RouterOS that supports EoIPv6 are vulnerable to this attack.

Affected products

• MikroTik RouterOS: any version

Published 2020-03-02. Last modified 2026-06-17.