CVE-2025-27840: Medium severity Espressif Esp32 Firmware vulnerability
Published Mar 8, 2025
·Updated
Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).
Affected Software
2 affected components
All of the following
Espressif Esp32 Firmware
Espressif ESP32
Event History
Mar 8, 2025
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverityWeakness
News Published
via BleepingComputer·04:12 PM
Data Sourced
via NVD·08:15 PM
DescriptionSeverityWeaknessAffected Software
Mar 9, 2025
News Published
via BleepingComputer·12:30 PM
Frequently Asked Questions
1
What is the severity of CVE-2025-27840?
CVE-2025-27840 is considered a high-severity vulnerability due to the potential for unauthorized access to hidden HCI commands on Espressif ESP32 chips.
2
How do I fix CVE-2025-27840?
To fix CVE-2025-27840, update the Espressif ESP32 firmware to the latest version that addresses this vulnerability.
3
What are the potential risks associated with CVE-2025-27840?
The risks associated with CVE-2025-27840 include unauthorized memory access and control over the ESP32 chips, which can lead to compromised devices.
4
Which devices are affected by CVE-2025-27840?
CVE-2025-27840 affects devices utilizing the Espressif ESP32 firmware that allow for hidden HCI commands.
5
Are there any security measures to mitigate CVE-2025-27840?
To mitigate CVE-2025-27840, implement strict access controls and monitor for unusual activities on devices using the affected firmware.