The Indian Computer Emergency Response Team (CERT-In) has issued a vulnerability note (CIVN-2025-0043) regarding an information disclosure vulnerability in Tinxy smart devices. The vulnerability has been assigned the CVE identifier CVE-2025-2189 and has been classified with a medium severity rating.
As smart home automation continues to grow in popularity, vulnerabilities in connected devices pose a significant risk to users’ security and privacy. This latest discovery highlights the importance of proper security measures in smart devices to prevent unauthorized access and data breaches.
Affected Systems
The vulnerability impacts several Tinxy smart devices, including:
- Tinxy Wi-Fi Lock Controller v1 RF
- Tinxy Door Lock with Wi-Fi Controller
- Tinxy 1 Node 10A and 16 Smart Wi-Fi Switches
- Tinxy 2, 4, and 6 Node Smart Wi-Fi Switches
- Tinxy Smart 15 Watts 3 in 1 Square Panel Ceiling Light
- Tinxy Smart 8 Watts 3 in 1 Round Panel Ceiling Light
These devices are commonly used in home automation, allowing users to remotely control locks, lights, and switches via Wi-Fi-enabled systems.
CVE-2025-2189: Overview of the Vulnerability
The reported vulnerability could potentially allow an attacker with physical access to the device to retrieve sensitive information stored within it. The compromise of plaintext credentials stored in the firmware increases the risk of unauthorized access, making it a security concern for users who rely on Tinxy smart devices for automation and security.
Who Should Be Concerned?
The vulnerability is particularly relevant for:
- Homeowners and end-users who use Tinxy smart devices for home automation.
- IT administrators and security professionals managing Tinxy-enabled smart environments.
- Businesses and organizations utilizing Tinxy smart switches and locks for security and convenience.
Tinxy Smart Devices: Risk and Impact Assessment
CERT-In has assessed this vulnerability as medium risk, meaning that while it may not pose an immediate threat to remote users, it impacts confidentiality and could lead to unauthorized access if exploited. Key risks include:
- Compromise of stored credentials: Attackers could retrieve plaintext login details stored in the firmware.
- Unauthorized device control: A malicious actor may gain access to the smart switch or lock, leading to security breaches.
- Potential escalation of attacks: Gaining access to one smart device could be used as a foothold for broader attacks on a smart home network.
Technical Description
Tinxy smart devices are Wi-Fi-enabled automation products that provide users with remote control over home security, lighting, and appliances. The vulnerability exists because of the storage of plaintext credentials within the device firmware. An attacker with physical access to the device could exploit this issue by extracting the firmware binary, analyzing its contents, and obtaining the hardcoded credentials stored on the device.
Once these credentials are retrieved, an attacker could potentially:
- Access the smart home network where the device is deployed.
- Manipulate device settings without the owner’s permission.
- Exploit further security weaknesses in related home automation systems.
How Was the Vulnerability Discovered?
This vulnerability was discovered and reported by Shravan Singh from Mumbai, India. Researchers continue to emphasize the need for strong encryption practices in IoT (Internet of Things) and smart home devices to prevent such security flaws.
Mitigation and Workarounds
CERT-In has recommended the following measures to mitigate the risks posed by this vulnerability:
- Perform a risk assessment: Evaluate the security implications of continuing to use Tinxy smart devices.
- Implement strict physical security measures: Ensure that unauthorized individuals do not have direct access to smart devices.
- Follow vendor instructions: Check for firmware updates and apply any patches or security mitigations provided by Tinxy.
- Consider discontinuing the use of affected devices: If a permanent fix is not available, users should look for alternative, more secure smart home solutions.
Best Practices for Securing Smart Devices
As IoT devices become more prevalent, users should adopt best practices to enhance their security:
- Regularly update firmware: Always install the latest security patches and firmware updates provided by the manufacturer.
- Use strong, unique passwords: Avoid using default or weak passwords for smart home devices.
- Enable network segmentation: Keep IoT devices on a separate network from critical systems.
- Disable unnecessary features: Turn off remote access or cloud synchronization if not needed.
- Monitor network activity: Use security monitoring tools to detect unusual behavior in connected devices.
Conclusion
The disclosure of CVE-2025-2189 serves as a reminder that physical security is just as important as network security. Users and administrators of Tinxy smart devices must take proactive steps to protect sensitive data, limit unauthorized access, and stay updated on vendor-recommended mitigations.
By implementing recommended security measures and staying informed about vulnerabilities, users can minimize risks and ensure a safer smart home experience.
