CVE-2026-30702 in WDR201A
Summary
by MITRE • 03/18/2026
The WiFi Extender WDR201A (HW V2.1, FW LFMZX28040922V1.02) implements a broken authentication mechanism in its web management interface. The login page does not properly enforce session validation, allowing attackers to bypass authentication by directly accessing restricted web application endpoints through forced browsing
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Analysis
by VulDB Data Team • 03/24/2026
The vulnerability identified as CVE-2026-30702 affects the WiFi Extender WDR201A model with hardware version 2.1 and firmware version LFMZX28040922V1.02, representing a critical weakness in the device's web management interface security architecture. This authentication bypass flaw stems from improper session validation mechanisms that fail to adequately verify user credentials before granting access to protected administrative functions. The device's web interface implementation does not enforce proper access controls, creating a pathway for unauthorized individuals to directly navigate to restricted endpoints without legitimate authentication.
The technical implementation of this vulnerability demonstrates a fundamental flaw in the application's security design where session management is insufficiently enforced. Attackers can exploit this weakness through forced browsing techniques by directly accessing specific URL endpoints that should only be accessible to authenticated administrators. This broken authentication mechanism falls under the CWE-287 category of "Improper Authentication" and specifically relates to CWE-305 which addresses "Authentication Bypass Through Multiple Implementations." The vulnerability exists because the web application fails to validate session tokens or user credentials at each access point, allowing unauthorized access to administrative functions through simple URL manipulation.
The operational impact of this vulnerability is significant as it provides attackers with complete administrative control over the WiFi extender without requiring legitimate credentials. Once exploited, adversaries can modify network configurations, change wireless settings, access sensitive network information, and potentially establish persistent access points within the network infrastructure. This represents a critical risk for both personal and enterprise environments where such devices may be deployed, as they could serve as entry points for broader network compromise. The vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1078 for Valid Accounts and T1046 for Network Service Scanning, as unauthorized access enables further reconnaissance and lateral movement within the network.
Mitigation strategies for this vulnerability should include immediate firmware updates from the manufacturer to address the authentication bypass issue, along with network segmentation to limit access to management interfaces. Organizations should implement network access controls that restrict direct access to device management interfaces from untrusted networks, while also ensuring that default administrative credentials are changed and that strong authentication mechanisms are enforced. The device should be configured to use HTTPS exclusively for management access, and network monitoring should be implemented to detect suspicious access patterns or unauthorized attempts to access restricted endpoints. Additionally, regular security audits should verify that all network devices properly enforce authentication mechanisms and that session management is appropriately implemented to prevent similar vulnerabilities from being introduced in future deployments.