Many(most?) Cortex-M4 systems boot from the reset vector and stack pointer stored in the first 8B of memory, so it's a valid address on a ton of small systems t

Many(most?) Cortex-M4 systems boot from the reset vector and stack pointer stored in the first 8B of memory, so it's a valid address on a ton of small systems today. You can relocate the vector table and to block it off with the MPU if you have one and memory to spare.