Mt6789 — Auth Bypass

To attempt a bypass on MT6789, you typically need the following environment set up on a Windows or Linux PC: : UsbDk , CDC Driver, and libusb filter drivers.

The most prominent tool is bkerler/mtkclient . It is an open-source, community-driven tool that has matured significantly.

The is a hardware-software exploitation method that circumvents this cryptographic handshake. By taking advantage of specific vulnerabilities in the BootROM code, researchers discovered they could trick the BROM into skipping the signature verification step entirely. How the Exploit Works (The SLA/DAA Vulnerability)

As of 2026, several tools are used to exploit the MT6789 chipset, categorized into open-source scripts and commercial tools. A. Open-Source: mtkclient

When users attempt to unbrick, unlock the bootloader, or flash custom firmware on these devices, they often hit a wall, encountering errors related to "SLA/DAA" (Secure Link Authentication/Download Agent Authentication) or "Secure V6" boot ROM protection. mt6789 auth bypass

Before discussing the flaw, we must understand the target. The MediaTek MT6789 is a system-on-a-chip (SoC) fabricated on a 6nm process. It is the successor to the Helio G90 series and is found in volume-brand devices such as:

Hold both keys, then connect the USB cable to the PC.

Tools like MTK Meta Utility v92 include specific parsers for MT6789 ( preloader_k6789v1_64 ). 5. Conclusion and Security Implications

If successful, the tool will report that SLA/DAA has been bypassed, and the device is ready for flashing. 5. Important Considerations and Risks To attempt a bypass on MT6789, you typically

Here’s a breakdown of what makes interesting from a research or forensic perspective:

Before diving into the specifics of the auth bypass vulnerability, it's essential to understand what MT6789 refers to. MT6789 is a chipset commonly used in various IoT (Internet of Things) devices, including but not limited to smart home appliances, routers, and other network devices. The MT6789 chipset is produced by MediaTek, a leading manufacturer of chipsets and other semiconductor products.

Exploits vulnerabilities in the Preloader USB communication.

While the boot ROM itself cannot be modified, manufacturers and Google have introduced layers of protection to mitigate the impact of an authentication bypass. 1. Hardware Revisions unlock the bootloader

The BROM USB stack contains vulnerabilities related to how it handles specific USB packets or control requests.

Historically, MediaTek authentication bypasses rely on specific software flaws within the boot ROM code itself:

The vulnerabilities documented above create tangible risks:

You can use dedicated open-source tools designed for MTK chipsets, such as the mtk-bypass or MTK Client utilities widely available on GitHub. Ensure the version you choose explicitly lists support for the MT6789 (Helio G99) chipset. Execution Steps

The official MediaTek Flash Tool, paired with a background bypass script to accept unsigned images.