Guys, new speadtrum bootloader vulnerability has discovered, it can let us write custom firmware on locked bootloader, and also read the bootloader unlock code, this vulnerability is important, so someone should make a tool from it. This could lead to universal root and bootloader unlock for speadtrum devices. Here is the article:https://research.nccgroup.com/2022/09/02/theres-another-hole-in-your-soc-unisoc-rom-vulnerabilities/?s=09