Mikrotik - Routeros - CRITICAL - CVE-2026-84411. The web management service of MikroTik's RouterOS is affected by an integer underflow issue that can be exploited by an unauthenticated attacker. This vulnerability allows for manipulation of HTTP request bodies, which could lead to arbitrary code execution with root privileges or cause a denial of service. The flaw can be accessed before the authentication process, presenting a significant risk to network security.