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Status published
Medium
CVE-2025-27840
Espressif ESP32 chips allow 29 hidden HCI commands, such as...
Vulnerability Description
Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdf
- https://x.com/pascal_gujer/status/1898442439704158276
- https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/
- https://www.bleepingcomputer.com/news/security/undocumented-backdoor-found-in-bluetooth-chip-used-by-a-billion-devices/
- https://reg.rootedcon.com/cfp/schedule/talk/5
- https://flyingpenguin.com/?p=67838
- https://github.com/em0gi/CVE-2025-27840
- https://github.com/orgs/espruino/discussions/7699
- https://www.bleepingcomputer.com/news/security/undocumented-commands-found-in-bluetooth-chip-used-by-a-billion-devices/
- https://darkmentor.com/blog/esp32_non-backdoor/
- https://news.ycombinator.com/item?id=43308740
- https://news.ycombinator.com/item?id=43301369
- https://github.com/esphome/esphome/discussions/8382
- https://cheriot.org/auditing/backdoor/2025/03/09/no-esp32-style-backdoor.html
- https://www.espressif.com/en/news/Response_ESP32_Bluetooth
Affected Vendor
Espressif
View all reports →Affected Software
ESP32
Vulnerable Versions:
2025-03-06
Timeline
Official Publish:
March 8th, 2025
Last Modified:
May 12th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Weaknesses (CWE)
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.