Always export your configuration before upgrading in case you need to factory reset.
Prior to the 2021-2022 rollout lifecycle, advanced users frequently accessed the VG421WDv2 root shell using default credential sets like adminHW via Telnet. The 2021 firmware hardened system entry points by strictly disabling default Telnet access. This mitigation protects user networks from remote code executions and unauthorized modification vectors. 🌐 Carrier Ecosystem Locking vg421wdv2 firmware 2021
Go to Settings > System > Upgrade Firmware (the menu path may vary slightly depending on your exact firmware revision). Always export your configuration before upgrading in case