Aaron Christophel | Dump Flash of WCH CH552 Chip series using its bootloader vulnerability @atc1441 | Uploaded November 2019 | Updated October 2024, 12 hours ago.
Explaining of the Ch55x Series Bootloader vulnerability.

Normally this chip does not have a function to read back the content of flash but with this it is possible.

This "hack" works on CH551 CH552 CH553 CH554 CH558 and CH559 chips from the company WCH


Thanks to Thomas :)

Here are some Links to this topic:

Playstore App: play.google.com/store/apps/details?id=com.atcnetz.de.ch55xprogrammerV2&hl=gsw

Mikrocontroller.net thread: mikrocontroller.net/topic/462538

Thomas Freader PC flash Dump: mikrocontroller.net/topic/462538?goto=new#5873139

Bootloader source code: mikrocontroller.net/topic/462538?page=1#5784458