Brom Disabled By — Efuse 0x146

Tools like Mediatek Easy Tool, CM2MTK, or commercial boxes (Infinity CM2, Miracle Thunder) sometimes have built-in brute-force or authentication bypass scripts. These exploit known vulnerabilities in the BROM protocol before the eFuse check is fully enforced. For example, sending a specific sequence of USB commands might trick the BROM into thinking the debug fuse is still intact. However, modern chips have patched most of these exploits.

If the BROM is dead but the eMMC is accessible via an external programmer (direct eMMC connection): brom disabled by efuse 0x146

Caution: Secure boot will still check signatures. You can only write signed firmware. Tools like Mediatek Easy Tool , CM2MTK ,

The error is widespread on:

In short, any MediaTek device released after 2021 with secure boot v2 or higher has a high probability of blowing the debug eFuse during the first boot. Caution: Secure boot will still check signatures