While the new firmware is generally superior, some users on older hardware revisions (PCB Rev 1.0) have reported that the new driver causes overheating.
Downgrade only if:
To downgrade, simply flash an older .bin file using the same process. D 39Link does not prevent downgrades.
Warning: Before downloading any file, you must identify your hardware revision (e.g., A1, A2, B1). Flashing firmware meant for a different hardware version will permanently "brick" the device. d 39link dwrm960 firmware new
Before diving into the firmware, let’s recap the device. The D 39Link DWRM960 is a CAT4 4G LTE router with a SIM card slot, four Ethernet ports, and external antenna connectors. It is popular for converting a mobile signal into a home Wi-Fi network. Users have historically reported issues with dropped connections, UI lag, and IP passthrough problems—issues a new firmware aims to solve.
Appendix A: Binwalk entropy graph of new vs old firmware.
Appendix B: Proof-of-concept for DHCPv6 heap spray (Excluded for brevity).
Assuming you mean the D-Link DWR‑M960 firmware (cellular 5G router), here’s a detailed, structured report covering firmware versions, changelog highlights, security fixes, upgrade guidance, rollback, and testing steps. If CVE details are required, consult vendor release
The new firmware (DWR-960_FW_v2.06_04_2024.bin) has been restructured. Using binwalk -E, we observed entropy changes in the first 512KB:
Mitigation: The UART console now outputs only:
d39link> (locked) [HMAC failure].
The bootloader verifies the signature of the kernel partition before mounting rootfs, preventing rollback attacks.
The d39link environment is no longer a full shell but a command dispatcher. We extracted the command table via dynamic analysis (QEMU user-mode): While the new firmware is generally superior, some
| Command | Function | Status |
| :--- | :--- | :--- |
| upgrade | HTTP/TFTP firmware fetch | Authenticated (Token required) |
| lte | AT command passthru to MDM9607 | Available (No auth) |
| reboot | System reset | Available |
| nand | Raw NAND read/write | Disabled |
| boot | Manual boot | Disabled |
Critical Finding: The lte command passes user input directly to the modem via /dev/ttyUSB2 without sanitization. This allows an attacker with physical USB access (or a compromised LAN host) to send arbitrary Hayes AT commands to the cellular modem.