CVE-2016-20029 in ZKBioSecurity
Summary
by MITRE • 03/16/2026
ZKTeco ZKBioSecurity 3.0 contains a file path manipulation vulnerability that allows attackers to access arbitrary files by modifying file paths used to retrieve local resources. Attackers can manipulate path parameters to bypass access controls and retrieve sensitive information including configuration files, source code, and protected application resources.
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Analysis
by VulDB Data Team • 03/16/2026
The vulnerability identified as CVE-2016-20029 resides within the ZKTeco ZKBioSecurity 3.0 software platform, a biometric security solution widely deployed in enterprise and industrial environments. This security flaw represents a critical path traversal vulnerability that fundamentally undermines the application's file access controls and data protection mechanisms. The affected system operates as a comprehensive biometric security management platform that handles sensitive personnel data, access logs, and system configurations, making it a prime target for adversaries seeking unauthorized access to protected information assets.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the file path handling mechanisms of the ZKBioSecurity 3.0 application. Attackers can exploit this weakness by manipulating path parameters in HTTP requests or API calls that are designed to retrieve local resources. The flaw occurs when the application fails to properly validate or sanitize user-supplied path data before using it to construct file system access operations. This allows malicious actors to inject directory traversal sequences such as ../ or ..\ that can navigate beyond the intended resource directories and access arbitrary files on the system. The vulnerability specifically affects how the application processes file path parameters during local resource retrieval operations, creating a direct pathway for unauthorized file access.
The operational impact of this vulnerability extends far beyond simple information disclosure, as it provides attackers with comprehensive access to sensitive system components that are typically protected by access controls. Successful exploitation can lead to the retrieval of configuration files containing database credentials, encryption keys, and system settings that could enable further attacks. Additionally, attackers may access source code repositories, application binaries, and other protected resources that could reveal implementation details and facilitate more sophisticated attacks. The vulnerability's severity is amplified by the fact that ZKTeco's biometric security platforms often handle highly sensitive data including employee biometric templates, access logs, and security event records that could be leveraged for identity theft, unauthorized access, or corporate espionage. This represents a significant compromise of the platform's security model and could potentially enable attackers to escalate privileges or gain persistent access to the affected systems.
Organizations utilizing ZKTeco ZKBioSecurity 3.0 should implement immediate mitigations including input validation controls, path normalization, and access restriction measures to prevent exploitation of this vulnerability. The recommended defensive strategies align with established security frameworks such as the CWE-22 Path Traversal vulnerability classification and should incorporate principles from the MITRE ATT&CK framework's privilege escalation and credential access tactics. System administrators should deploy web application firewalls to filter malicious path traversal attempts, implement proper file access controls, and conduct thorough security audits of the application's resource access patterns. Regular security updates and patches from ZKTeco should be applied immediately upon availability, while network segmentation and monitoring controls should be implemented to detect and prevent unauthorized access attempts. The vulnerability also underscores the importance of secure coding practices and input validation controls as outlined in industry standards such as the OWASP Top Ten and ISO/IEC 27001 security requirements for protecting sensitive information assets.