CVE-2019-25227 in HN-2204AP Router
Summary
by MITRE • 11/27/2025
Tellion HN-2204AP routers contain an unauthenticated configuration disclosure vulnerability in the /cgi-bin/system_config_file management endpoint. The endpoint allows remote retrieval of a compressed configuration archive without requiring authentication or authorization. The exposed configuration may include administrative credentials, wireless keys, and other sensitive settings, enabling an unauthenticated attacker to obtain information that can facilitate further compromise of the device or network.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 11/29/2025
The Tellion HN-2204AP router presents a critical security vulnerability through its unauthenticated configuration disclosure flaw in the /cgi-bin/system_config_file management endpoint. This vulnerability represents a fundamental failure in the router's access control mechanisms, allowing any remote attacker to retrieve sensitive system configuration data without providing valid credentials or authorization. The flaw exists within the web management interface implementation where the system_config_file endpoint lacks proper authentication checks, creating an exploitable pathway for unauthorized information retrieval.
The technical nature of this vulnerability aligns with CWE-284, which describes improper access control mechanisms in software systems. The endpoint's design fails to implement adequate authentication requirements, enabling attackers to directly access compressed configuration archives containing critical system information. This configuration disclosure vulnerability operates at the application layer, specifically within the router's web server implementation, where administrative functions are exposed without proper security controls. The flaw essentially provides a backdoor mechanism for information gathering that bypasses normal authentication protocols and privilege escalation requirements.
The operational impact of this vulnerability extends beyond simple information disclosure, creating a significant attack surface for malicious actors seeking to compromise network infrastructure. An unauthenticated attacker can obtain compressed configuration files that typically contain administrative credentials, wireless network keys, and other sensitive network settings. This information enables attackers to establish persistent access to the affected network, potentially facilitating lateral movement, credential reuse attacks, or further exploitation of connected devices. The vulnerability essentially provides attackers with a roadmap for network compromise, making it particularly dangerous in environments where network security is paramount.
Security professionals should consider this vulnerability in the context of ATT&CK framework's T1083 (File and Directory Discovery) and T1566 (Phishing for Information) techniques, as it enables automated reconnaissance and information gathering without requiring social engineering or complex attack chains. The vulnerability's exploitation requires minimal technical skill and provides maximum informational value to attackers, making it a preferred target for both automated scanning tools and targeted attacks. Organizations should implement immediate mitigation measures including network segmentation, firewall rule configurations to restrict access to management interfaces, and patching procedures to address the underlying authentication flaw. Regular security assessments should include verification of access controls on all management endpoints to prevent similar configuration disclosure vulnerabilities from remaining undetected in network infrastructure devices.