CVE-2018-10070

Imagine your router as a doorman that normally handles a steady flow of visitors. With this bug, someone can send a weird “FTP message” that makes the doorman work nonstop until the building’s resources run out, and then the router reboots. For a small business, that can mean losing internet or internal connectivity until it comes back.

This matters if you use MikroTik router firmware version 6.41.4 and your router’s FTP service on port 21 is reachable from the internet. Because the issue is unauthenticated, you don’t need logins for an attacker to try it. The real risk is when attackers can reach port 21 (for example, if FTP is exposed to the public internet).

This should be treated as a priority because there is a public exploit available and the attack can directly exhaust CPU and RAM without any authentication. While the vendor-specific fix details weren’t found in the available information, the impact (service disruption and reboots) is immediate when triggered. Given the traffic-light verdict is AMBER, act now on exposure reduction and confirm an upgrade/mitigation path with your vendor.