Given that the last known firmware for the J1 hardware is me_1.00 (from 2017), which is well below the affected version numbers, it is highly probable that your J1 router contains unpatched security flaws. D-Link has officially listed the DSL-2750U as and End-of-Service (EOS) . This means D-Link no longer provides firmware updates, security patches, or technical support for this model.
The DSL-2750U is a versatile, high-performance modem router for home and small office use. It supports ADSL2+ connections with download speeds up to 24 Mbps, includes a 4-port Fast Ethernet switch for wired devices, and provides 802.11n wireless networking . Additional features include a built-in firewall with advanced security functions, Quality of Service (QoS), support for 3G/LTE USB modems as a backup WAN connection, a USB port for network sharing, and a web-based configuration interface. d-link dsl-2750u h w ver j1 firmware
The hardware version J1 and specific firmware version you mentioned may have addressed some of the issues mentioned above. However, without more information about the specific firmware version, it's difficult to provide a detailed review. Given that the last known firmware for the