CVE-2025-27840
MEDIUM 6.8EPSS 1.4%
Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).
- Affected
- Espressif · ESP32
- CVSS v3.1 NVD
- 6.8 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N - CVSS v3.1 MITRE
- 6.8 MEDIUM
CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L - EPSS
- 1.36% chance of exploitation in the next 30 days, 71st percentile
- Published
- 2025-03-08
- Updated
- 2025-05-12
Proof-of-concept exploits (3)
- demining/Bluetooth-Attacks-CVE-2025-2784012★ · 2025-03-30
- em0gi/CVE-2025-2784011★ · 2025-03-09
- ladyg00se/CVE-2025-27840-WIP0★ · 2025-04-08
Security advisories
- https://cheriot.org/auditing/backdoor/2025/03/09/no-esp32-style-backdoor.html
- https://darkmentor.com/blog/esp32_non-backdoor
- https://flyingpenguin.com/?p=67838
- TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdf
- https://reg.rootedcon.com/cfp/schedule/talk/5
- https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices
- https://x.com/pascal_gujer/status/1898442439704158276
- esphome/esphome/discussions/8382
- orgs/espruino/discussions/7699
- https://news.ycombinator.com/item?id=43301369
- https://news.ycombinator.com/item?id=43308740