Full Report
Following the disclosure of an authorization bypass vulnerability in the Motorola Mobility Droid Razr HD (Model XT926), another major security flaw in a widely used product now threatens global organizations with unauthorized access and potential control over critical systems. The ESP32 microchip by Espressif, found in over 1 billion devices as of 2023, contains 29 […] The post CVE-2025-27840: Vulnerability Exploitation in Espressif ESP32 Bluetooth Chips Can Lead to Unauthorized Access to Devices appeared first on SOC Prime.
Analysis Summary
# Vulnerability: Unauthorized Access via Undocumented Commands in ESP32 Bluetooth Chips
## CVE Details
- CVE ID: CVE-2025-27840
- CVSS Score: Information on the specific CVSS score is not provided, however, the vendor *considers the risk to be low*.
- CWE: Not explicitly stated, but relates to improper authorization/command handling.
## Affected Systems
- Products: Espressif ESP32 Bluetooth Chips
- Versions: ESP32 product version from 2025-03-06 (Note: This date likely refers to a specific firmware/software release date affected, not the general product line).
- Configurations: Devices utilizing the vulnerable Bluetooth implementation on ESP32 chips.
## Vulnerability Description
The vulnerability stems from the existence of undocumented commands within the Bluetooth functionality of the ESP32 chips. The exploitation of these undocumented commands allows an attacker to bypass conventional security measures, leading to unauthorized access to the device. This flaw poses risks to data integrity, potentially allowing attackers to modify or corrupt stored information, and endangers IoT devices, particularly in critical industry verticals.
## Exploitation
- Status: PoC available (A Proof of Concept code developed by security researchers exists).
- Complexity: Not explicitly stated, but the existence of a PoC suggests functional exploitation is feasible.
- Attack Vector: Likely Network or Adjacent, given the Bluetooth context, allowing unauthorized access or covert operations.
## Impact
- Confidentiality: High (Enables unauthorized access, potentially leading to data exposure).
- Integrity: High (Attackers can modify or corrupt stored data).
- Availability: Medium/High (Compromised IoT devices can lead to service disruption).
## Remediation
### Patches
- The vendor has announced plans to release a software fix to **remove the related undocumented commands**. (Specific version numbers for the patch are not provided in the context).
### Workarounds
- No specific workarounds are detailed in the provided text.
## Detection
- Indicators of compromise: Unauthorized execution of commands or unexpected system behavior related to Bluetooth operations.
- Detection methods and tools: Organizations can rely on the SOC Prime Platform for collective cyber defense to timely identify CVE exploitation attempts.
## References
- Vendor Advisory: hxxps://www.espressif.com/en/news/response_esp32_bluetooth
- Source Article Platform: hxxps://socprime.com/blog/cve-2025-27840-vulnerability-in-esp32-bluetooth-chips