Mt6789 Auth Bypass Better -

By hooking the USB handshake between BootROM and the host, one can substitute a signed but benign DA from an older MTK chip (e.g., MT6765) before switching to a patched DA. MT6789 checks only the first DA’s signature, not subsequent ones.

Not all MT6789 devices are equal. A device shipped with firmware from 2022 may have the CVE-2022-21754 (preloader stack overflow), while a 2024 device will not. A "better" bypass starts with passive enumeration using a logic analyzer or USB descriptors.

The classic methods for MediaTek bypasses are failing for three reasons: mt6789 auth bypass better

A better mt6789 auth bypass means: No shorting, no timing lottery, and zero risk of permanent lock.

payload = open("custom_da.bin", "rb").read() dev.ctrl_transfer(bmRequestType=0x40, bRequest=0x07, wValue=0, wIndex=0, data_or_wLength=payload) By hooking the USB handshake between BootROM and

After execution, any signed or unsigned code can be uploaded to SRAM and executed with full privilege.

Using pyusb and a Linux host:

import usb.core
import usb.util
import time
dev = usb.core.find(idVendor=0x0e8d, idProduct=0x2000)  # MTK Preloader
if dev is None:
raise ValueError("Device not found")
The MT6789 (Dimensity 900 / 920 / 1300 family) introduced hardened authentication for the Preloader and Boot ROM stages, closing several legacy bypasses (e.g., SLA/DAA weaknesses, SP flash tool handshake flaws). However, no silicon is bulletproof — and MT6789 is no exception. A better mt6789 auth bypass means: No shorting,