CVE-2026-78239 in LK100W
Summary
by MITRE • 08/28/2026
Xiiaozet LK100W exposes a critical management function that can be invoked without authentication, allowing a remote attacker to enable administrative services that should be restricted. Successful exploitation may permit unauthorized access to the device.
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Analysis
by VulDB Data Team • 08/28/2026
The vulnerability identified in Xiiaozet LK100W devices represents a severe misconfiguration of the management interface architecture, specifically involving an unauthenticated invocation of critical administrative functions. This flaw allows remote attackers to interact with system controls that are intended to be restricted to authorized personnel only. The core technical issue lies in the absence of proper access control mechanisms on specific endpoints or API calls within the device's firmware. Instead of requiring valid credentials or session tokens before executing privileged commands, the system processes these requests from any source IP address without verification. This design oversight effectively bypasses authentication protocols, granting external actors the ability to modify critical settings that dictate how the device operates and communicates with other network entities.
From a technical perspective, this vulnerability aligns closely with CWE-284 Improper Access Control and CWE-306 Missing Authentication for Critical Function. The attacker can exploit this weakness by sending specifically crafted HTTP requests or API calls to the management interface of the LK100W device. Since no authentication is required, the request is processed as if it originated from a legitimate administrator. This capability enables the remote enablement of administrative services such as Telnet, SSH, or web-based management portals that are typically disabled by default for security reasons. By activating these services, the attacker establishes persistent backdoors within the network infrastructure, facilitating further lateral movement and deeper penetration into protected environments.
The operational impact of this vulnerability is significant, particularly in industrial control systems and IoT deployments where Xiiaozet devices are commonly utilized. Successful exploitation permits unauthorized access to the device, which can lead to a complete compromise of system integrity and availability. An attacker could use this foothold to exfiltrate sensitive data, disrupt critical operations by altering configuration parameters, or pivot to other connected devices on the same network segment. In environments where reliability is paramount, such as manufacturing plants or utility grids, the ability to remotely enable administrative services can result in prolonged downtime, safety hazards, and substantial financial losses due to operational disruption.
Mitigation strategies must focus on immediate remediation of the access control flaw and broader security hardening measures. The vendor should release a firmware update that enforces strict authentication requirements for all management functions, ensuring that no privileged operations can be executed without valid credentials. In the interim, network administrators should isolate these devices in segregated VLANs with restrictive firewall rules that block external access to the management ports entirely. Additionally, implementing intrusion detection systems configured to monitor for anomalous HTTP requests targeting administrative endpoints can provide early warning of exploitation attempts. Regular security audits and penetration testing are recommended to identify similar misconfigurations across other connected IoT assets before they can be leveraged by malicious actors.