CVE-2016-10185 in DWR-932B
Summary
by MITRE
An issue was discovered on the D-Link DWR-932B router. A secure_mode=no line exists in /var/miniupnpd.conf.
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Analysis
by VulDB Data Team • 05/16/2026
The vulnerability identified as CVE-2016-10185 affects the D-Link DWR-932B router model and represents a critical configuration flaw that undermines the device's network security posture. This issue stems from the presence of a secure_mode=no parameter within the /var/miniupnpd.conf configuration file, which directly impacts how the router handles universal plug and play services. The miniupnpd daemon is responsible for managing upnp functionality that allows devices on a local network to automatically configure port mappings and facilitate communication with external networks. When secure_mode is disabled, the router operates in a less secure configuration that exposes the network to potential exploitation by malicious actors.
The technical flaw manifests through the improper configuration of the upnp service daemon, specifically the absence of proper security controls that should be enabled by default. This misconfiguration creates an attack surface that allows unauthorized users to manipulate port mappings and potentially gain access to internal network resources. The vulnerability is particularly concerning because it affects the core network functionality that enables seamless device communication while simultaneously weakening the router's security framework. According to CWE-276, this represents a classic case of improper privilege management where the default security settings have been deliberately or accidentally disabled, creating a path for unauthorized access to network resources.
The operational impact of this vulnerability extends beyond simple network configuration issues, as it can enable various malicious activities including port scanning, unauthorized access to internal services, and potential man-in-the-middle attacks. Attackers can exploit the disabled secure_mode to manipulate the upnp service and gain insights into the internal network topology. This vulnerability directly aligns with ATT&CK technique T1071.004, which involves application layer protocol manipulation, and T1046, which covers network service scanning. The router's exposure through the upnp service means that any device on the network that supports upnp functionality becomes a potential entry point for attackers, particularly when combined with other network reconnaissance activities.
Security implications of this vulnerability are compounded by the fact that many users may not be aware of the configuration changes or their security implications. The default state of the router configuration file suggests that the manufacturer intended to provide a more secure setup but failed to properly implement the secure_mode parameter. This vulnerability demonstrates how simple configuration oversight can lead to significant security risks, particularly in network infrastructure devices that serve as gateways between internal and external networks. Organizations and individuals using the D-Link DWR-932B router should immediately investigate their configuration files and ensure that secure_mode is properly enabled to prevent unauthorized access to their network services. The mitigation strategy involves manual verification and correction of the configuration file, ensuring that secure_mode=yes is properly set, along with implementing additional network monitoring and access control measures to detect and prevent exploitation attempts.