A recent report indicates that DIR-868L HW Rev. B, FW v2.03 and DIR-817LW Rev. A FW v1.04, filed under CVE-2019-17506, are accused of authentication bypass and information disclosure The  reported security issue is currently under investigation by D-Link.   D-Link will provide updates as soon as it has more information.
D-Link  takes the issues of network security and user privacy very seriously.  We have a dedicated task force and product management team on call to  address evolving security issues and implement appropriate security  measures. Please check the D-Link website for updates regularly.