CVE-2018-1157: Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to a memory exhaustion vulnerability.

Security readout for executives and security teams

This issue can let a logged-in remote attacker make the MikroTik RouterOS HTTP service crash, and in some cases force the router to reboot. The business risk is loss of availability for affected network devices, especially where management interfaces are reachable beyond trusted administrators. Exposure is most likely where MikroTik RouterOS before 6.42.7 or 6.40.9 is still in use and its HTTP management service is reachable by authenticated remote users. Treat this as a network availability risk. Prioritize exposed or remotely managed MikroTik routers, then patch during a controlled maintenance window and tighten management-plane access. Mitigation focus: Upgrade RouterOS to 6.42.7, 6.40.9, or a later vendor-supported release.; Review MikroTik changelogs and current vendor guidance for branch-specific upgrade direction.; Restrict HTTP management access to trusted administrative networks only..

Prepared

Jun 7, 2026, 05:54 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.