CVE-2021-47710 in Smart Home Ruvie CCTV Bridge DVR Service
Summary
by MITRE • 12/10/2025
COMMAX Smart Home System is a smart IoT home solution that allows an unauthenticated attacker to disclose RTSP credentials in plain-text by exploiting the /overview.asp endpoint. Attackers can access sensitive information, including login credentials and DVR settings, by submitting a GET request to this endpoint.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 12/10/2025
The COMMAX Smart Home System represents a significant security vulnerability identified as CVE-2021-47710, where an unauthenticated attacker can exploit the /overview.asp endpoint to obtain RTSP credentials in plain text format. This vulnerability resides within IoT home automation solutions that are increasingly prevalent in smart home ecosystems, making it particularly concerning from a cybersecurity perspective. The flaw allows for unauthorized information disclosure without requiring any authentication credentials, creating an immediate and severe risk to users who rely on these systems for home security and monitoring.
The technical implementation of this vulnerability stems from improper access control mechanisms within the web interface of the COMMAX Smart Home System. The /overview.asp endpoint fails to enforce authentication checks, enabling any remote attacker to submit a simple GET request and receive sensitive information including RTSP credentials and DVR configuration settings. This represents a classic case of inadequate input validation and access control, falling under CWE-284 which addresses improper access control in software systems. The vulnerability essentially provides a backdoor mechanism that bypasses normal authentication procedures, allowing attackers to obtain critical system information that would typically be restricted to authorized users only.
The operational impact of this vulnerability extends beyond simple credential disclosure, as RTSP credentials provide attackers with direct access to video streams from connected surveillance cameras. This creates a comprehensive security breach where attackers can not only view live feeds but also potentially manipulate DVR settings, access historical footage, and gain insights into home security patterns. The plain text exposure of credentials means that attackers can immediately leverage this information without additional exploitation steps, making the attack surface extremely wide and the potential damage significant. This vulnerability directly aligns with ATT&CK technique T1071.004 which covers application layer protocol: DNS, and T1566 which addresses credential harvesting through various means including information disclosure.
Mitigation strategies for CVE-2021-47710 must include immediate patching of affected systems, implementation of network segmentation to isolate IoT devices from critical infrastructure, and enforcement of strong authentication mechanisms. Organizations should deploy network monitoring solutions to detect unauthorized access attempts to web endpoints and implement proper firewall rules to restrict access to administrative interfaces. The vulnerability also highlights the importance of secure coding practices and regular security assessments of IoT devices, particularly those handling sensitive information. Additionally, users should be educated about the risks of exposing IoT devices to public networks and the importance of changing default credentials. This vulnerability demonstrates how seemingly minor access control flaws can create major security risks in IoT ecosystems and underscores the need for comprehensive security measures across all system components.