@zoogie has released the userland exploit with the beautiful name "Bannerbomb3" for the 3DS.
https://github.com/zoogie/Bannerbomb3/releases
This exploit uses a buffer overflow in the title of DSiWare Banner to dump the DS Internet Settings title. In these can then inject the Japanese version of Flipnote Studio, with the ultimate boot9strap can be installed and thus free custom firmware.
But you need your movable.sed for that. This is dumped with Seedminer, so we recommend that you follow 3ds.hacks.guide for a step-by-step guide.
https://wiidatabase.de/bannerbomb3-fuer-den-3ds-veroeffentlicht-seedminer-ohne-spiel/
https://github.com/zoogie/Bannerbomb3/releases
This exploit uses a buffer overflow in the title of DSiWare Banner to dump the DS Internet Settings title. In these can then inject the Japanese version of Flipnote Studio, with the ultimate boot9strap can be installed and thus free custom firmware.
But you need your movable.sed for that. This is dumped with Seedminer, so we recommend that you follow 3ds.hacks.guide for a step-by-step guide.
https://wiidatabase.de/bannerbomb3-fuer-den-3ds-veroeffentlicht-seedminer-ohne-spiel/