CVE-2016-10180 in DWR-932B
Summary
by MITRE
An issue was discovered on the D-Link DWR-932B router. WPS PIN generation is based on srand(time(0)) seeding.
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Analysis
by VulDB Data Team • 05/16/2026
The vulnerability identified in the D-Link DWR-932B router represents a critical weakness in the wireless protected setup implementation that exposes the device to predictable authentication attacks. This issue stems from the router's insecure random number generation mechanism during WPS PIN calculation, where the srand function is seeded with the current system time. The flaw allows attackers to predict the WPS PIN through brute force or timing attacks, effectively undermining the security of the wireless network protection mechanism.
This vulnerability directly relates to CWE-330, which addresses the use of insufficiently random values in security contexts. The router's implementation of srand(time(0)) creates a deterministic sequence that can be easily reverse-engineered by adversaries who know or can approximate the time when the PIN was generated. The time-based seeding approach eliminates the entropy necessary for cryptographic security, making the WPS PIN generation process vulnerable to computational attacks. According to the ATT&CK framework, this weakness maps to T1110.003, which covers credential access through brute force methods targeting wireless networks.
The operational impact of this vulnerability extends beyond simple network access compromise, as it enables attackers to gain unauthorized administrative control over the router configuration. Once the WPS PIN is determined, attackers can modify network settings, install malicious firmware, or establish persistent access points within the network infrastructure. The vulnerability affects the router's ability to provide secure wireless connectivity and can lead to complete network compromise, especially when combined with other network reconnaissance activities. This weakness particularly impacts enterprise and home networks that rely on WPS functionality for device provisioning.
Mitigation strategies for this vulnerability require immediate firmware updates from D-Link to address the random number generation implementation, followed by disabling WPS functionality entirely on affected devices. Network administrators should implement additional security controls such as monitoring for unauthorized WPS connections and deploying intrusion detection systems to identify potential exploitation attempts. The recommended approach aligns with security best practices outlined in NIST SP 800-53, which emphasizes the importance of cryptographic implementation security and the need for proper random number generation in security-sensitive applications. Organizations should also consider implementing network segmentation and additional authentication layers to reduce the attack surface when WPS cannot be completely disabled.