: Version 3.18 is often used to connect to older RouterOS versions (like v5.x or early v6.x) that might have issues with newer Winbox versions. Neighbor Discovery
One of the reasons Winbox 3.18 maintained its popularity was its extreme lightweight nature: Winbox 3.18 Download
Winbox 3.18 does not include the latest security patches that newer versions (like 3.40+) incorporate. However, if you are using it (e.g., a management VLAN) or over a secured VPN, the risk is minimal. The core protocol has not changed dramatically. : Version 3
To summarize:
For cloud-hosted routers or public-facing management, consider using a newer version or tunneling Winbox traffic through SSH or IPsec. But for internal labs, small office networks, and legacy systems, Winbox 3.18 remains perfectly viable. The core protocol has not changed dramatically
This specific version was released primarily to address connectivity issues. MikroTik community forum