Executive Summary

Informations
Name CVE-2025-27840 First vendor Publication 2025-03-08
Vendor Cve Last vendor Modification 2025-03-12

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Overall CVSS Score 6.8
Base Score 6.8 Environmental Score 6.8
impact SubScore 5.8 Temporal Score 6.8
Exploitabality Sub Score 0.5
 
Attack Vector Physical Attack Complexity Low
Privileges Required High User Interaction None
Scope Changed Confidentiality Impact High
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-27840

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1

Sources (Detail)

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
https://github.com/em0gi/CVE-2025-27840
https://github.com/esphome/esphome/discussions/8382
https://github.com/orgs/espruino/discussions/7699
https://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothT...
https://news.ycombinator.com/item?id=43301369
https://news.ycombinator.com/item?id=43308740
https://reg.rootedcon.com/cfp/schedule/talk/5
https://www.bleepingcomputer.com/news/security/undocumented-backdoor-found-in...
https://www.bleepingcomputer.com/news/security/undocumented-commands-found-in...
https://www.espressif.com/en/news/Response_ESP32_Bluetooth
https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/
https://x.com/pascal_gujer/status/1898442439704158276
Source Url

Alert History

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Date Informations
2025-03-12 17:20:30
  • Multiple Updates
2025-03-11 21:20:32
  • Multiple Updates
2025-03-11 03:13:00
  • Multiple Updates
2025-03-10 17:19:55
  • Multiple Updates
2025-03-10 09:20:32
  • Multiple Updates
2025-03-10 05:20:29
  • Multiple Updates
2025-03-09 00:20:28
  • First insertion