CVE-2014-0343 in GW6110A
Summary
by MITRE
The web interface on Virtual Access GW6110A routers with software 9.00 before 9.09.27, 9.50 before 9.50.21, and 10.00 before 10.00.21 allows remote authenticated users to gain privileges via a modified JavaScript variable.
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Analysis
by VulDB Data Team • 05/09/2026
The CVE-2014-0343 vulnerability affects Virtual Access GW6110A routers running specific firmware versions, representing a critical privilege escalation flaw within the device's web interface. This vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly validate JavaScript variables submitted through the web administration interface. The flaw specifically targets the router's authentication and authorization mechanisms, allowing authenticated attackers to manipulate JavaScript variables that control access permissions and administrative functions.
The technical implementation of this vulnerability involves the manipulation of client-side JavaScript variables that are subsequently processed server-side without proper validation. When an authenticated user accesses the router's web interface, certain JavaScript variables are used to determine the user's privilege level and access rights. Attackers can modify these variables to elevate their privileges from standard user level to administrative access, bypassing the normal authentication and authorization controls that should prevent such privilege escalation. This represents a classic case of insufficient input validation where the system trusts client-side data without proper server-side verification.
The operational impact of this vulnerability is severe as it allows remote authenticated attackers to gain full administrative control over affected routers without requiring additional credentials or physical access. Once exploited, attackers can modify router configurations, change network settings, disable security features, access sensitive data, and potentially establish backdoors for persistent access. The vulnerability affects multiple firmware versions across different major releases, indicating a systemic flaw in the web interface implementation that was not properly addressed in the affected software updates. This creates a widespread risk across deployments that have not yet been patched to versions 9.09.27, 9.50.21, or 10.00.21.
The vulnerability aligns with CWE-20, which describes improper input validation, and represents a privilege escalation scenario that can be categorized under the MITRE ATT&CK framework's privilege escalation tactics. Organizations using these affected routers face significant risk of network compromise, as the vulnerability enables attackers to establish persistent access points within their network infrastructure. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical proximity to the device, making it particularly dangerous for enterprise and home network deployments. Security professionals should prioritize patching affected devices and implementing network monitoring to detect potential exploitation attempts.
Mitigation strategies should include immediate firmware updates to the latest available versions that address this vulnerability, along with network segmentation to limit access to administrative interfaces. Organizations should also implement strict access controls, monitor web interface access logs for suspicious activity, and consider network-based intrusion detection systems to identify potential exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and the potential consequences of failing to validate client-side data before processing it in server-side applications, particularly in network infrastructure devices where the impact of privilege escalation can be devastating to overall network security posture.