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CVE-2025-32875: Unencrypted Bluetooth Data Transmission Vulnerability in COROS Application

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Overview

A critical vulnerability, CVE-2025-32875, has been discovered in the COROS Android application up to version 3.8.12. This vulnerability is particularly concerning due to its potentially broad impact, affecting all users of the application who use Bluetooth pairing. As a result, any data sent via Bluetooth Low Energy (BLE) remains unencrypted, leaving it open to eavesdropping and potential misuse by attackers within Bluetooth range.
This vulnerability is significant since it exposes sensitive user data to potential compromise. The failure of the application to enforce Bluetooth pairing and bonding, coupled with the lack of encryption for data transmitted via BLE, presents a notable risk to user privacy and data security.

Vulnerability Summary

CVE ID: CVE-2025-32875
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network (Bluetooth)
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

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Product | Affected Versions

COROS App for Android | Up to 3.8.12

How the Exploit Works

The exploit takes advantage of the COROS application’s failure to initiate and enforce Bluetooth pairing and bonding. Consequently, data transmitted via BLE remains unencrypted. If a user manually initiates pairing and bonding through Android settings, the application continues to transmit data without requiring the watch to be bonded. This behavior allows attackers to eavesdrop on the communication and potentially exploit it, even conducting a machine-in-the-middle attack.

Conceptual Example Code

The following pseudocode represents a simplified concept of how an attacker can eavesdrop on the unencrypted Bluetooth communication between the COROS application and the watch.

def eavesdrop_bluetooth_communication(target_device):
connect_to_target(target_device)
while True:
data = receive_data_from_target(target_device)
if data:
print("Received data: ", data)

In this conceptual example, the attacker creates a function to connect to the target device and continually receive unencrypted data. Please note, this is a simplified representation of how the vulnerability might be exploited and actual exploitation may require more complex steps and a deep understanding of Bluetooth communication protocols and security.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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