CVE-1999-0816 in CableRouter
Summary
by MITRE
The Motorola CableRouter allows any remote user to connect to and configure the router on port 1024.
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Analysis
by VulDB Data Team • 04/17/2026
The vulnerability identified as CVE-1999-0816 represents a critical security flaw in Motorola CableRouter devices that exposes administrative functions to unauthorized remote access. This issue stems from the router's configuration that permits unrestricted access to its administrative interface through port 1024, which is typically reserved for private or client-side applications. The flaw fundamentally undermines the device's security model by eliminating authentication barriers for administrative operations, allowing any remote attacker to gain full control over the router's configuration parameters and potentially compromise the entire network infrastructure.
The technical implementation of this vulnerability involves the router's failure to properly validate incoming connections on port 1024, which serves as the default administrative port for configuration access. This design flaw creates a backdoor that bypasses normal authentication mechanisms and authorization controls, enabling attackers to perform administrative tasks such as modifying network settings, changing passwords, configuring firewall rules, and accessing sensitive network information. The vulnerability specifically relates to CWE-284, which addresses improper access control in software systems, and demonstrates how inadequate privilege management can lead to complete system compromise. The exposure of this port without proper authentication represents a classic example of insecure default configurations that violate fundamental security principles.
The operational impact of CVE-1999-0816 extends far beyond simple unauthorized access, as it provides attackers with complete control over the network infrastructure. Once an attacker gains access through port 1024, they can manipulate routing tables, disable network services, install malicious software, or redirect traffic to malicious destinations. This vulnerability directly maps to multiple ATT&CK techniques including T1071.004 for application layer protocol usage, T1021.001 for remote services access, and T1059.001 for command and scripting interpreter usage. The compromise of a CableRouter can lead to widespread network disruption, data interception, and potential lateral movement within the network, making it a particularly dangerous vulnerability for enterprise and home network environments alike.
Organizations affected by this vulnerability should immediately implement network segmentation strategies to isolate critical infrastructure from public-facing networks, disable unused services and ports, and apply firmware updates from Motorola when available. The recommended mitigation approach includes configuring firewalls to block external access to port 1024, implementing strong access controls for remaining administrative ports, and conducting thorough network audits to identify any other exposed administrative interfaces. Security monitoring should be enhanced to detect unusual access patterns on administrative ports, and network administrators should establish regular vulnerability assessments to identify similar insecure configurations. This vulnerability underscores the critical importance of secure configuration management and demonstrates how default settings can create persistent security risks that require immediate attention and remediation.