In MikroTik RouterOS, a stack-based buffer overflow occurs when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system.
Apply updates per vendor instructions.
CWE-119
https://www.coresecurity.com/core-labs/advisories/mikrotik-routeros-smb-buffer-overflow#vendor_update, https://mikrotik.com/download