If you must use WinBox or SSH, change their default port numbers to make them harder for automated scanners to find.
Create a new administrator account with a unique name and delete or disable the default account named "admin". 4. Implement Firewall Rules
This is the single most important security measure. MikroTik regularly releases updates to patch newly discovered security flaws.
Regularly check for updates in the RouterOS QuickSet menu or via the command line.
Hundreds of thousands of routers were compromised. Attackers used the access to build massive botnets (like Meris), inject malicious scripts into users' web traffic, and conduct cryptocurrency mining. 2. The RouterOS Remote Code Execution (CVE-2019-3943)
This vulnerability involved a directory traversal flaw in the RouterOS web interface. It allowed an authenticated user—or an attacker bypassing authentication via related chain exploits—to read and write files anywhere on the system, leading to full remote code execution. 3. DNS Poisoning via Authentication Bypass
When an attacker successfully exploits an authentication bypass on a MikroTik router, the consequences for the attached network are severe: