CVE-2025-27840

Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 Write memory...

CVE-2025-27840

CVE-2025-27840 concerns Espressif ESP32 family chips. The public materials describe 29 hidden HCI/debug commands (notably 0xFC02: Write memory) that are undocumented and could enable memory writes in affected devices. Espressif explicitly states these are internal debug commands not remotely acce...