CVE-2025-27840 – Espressif ESP32 HCI Command Injection Vulnerability

The following table lists the changes that have been made to the
CVE-2025-27840 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Mar. 08, 2025

    Action Type Old Value New Value
    Added Description Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).
    Added CVSS V3.1 AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
    Added CWE CWE-912
    Added Reference https://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdf
    Added Reference https://reg.rootedcon.com/cfp/schedule/talk/5
    Added Reference https://www.bleepingcomputer.com/news/security/undocumented-backdoor-found-in-bluetooth-chip-used-by-a-billion-devices/
    Added Reference https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/
    Added Reference https://x.com/pascal_gujer/status/1898442439704158276
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