Stack-based Buffer Overflow Vulnerability in D-Link DIR-816 Router

CVE-2025-5622

What is CVE-2025-5622?

CVE-2025-5622 is a critical vulnerability identified in the D-Link DIR-816 router. This router serves as a network device designed to facilitate internet connectivity for various devices within a home or office environment. The vulnerability manifests in the form of a stack-based buffer overflow within the function responsible for handling Wi-Fi configuration parameters, specifically related to the 5GHz wireless access point settings. Attackers can exploit this vulnerability remotely by manipulating specific input parameters associated with wireless configuration, which can lead to the execution of arbitrary code on the device. This presents a significant risk, particularly because the affected product is no longer supported by the vendor, leaving organizations vulnerable to potential exploits.

Potential impact of CVE-2025-5622

1. Remote Code Execution: Successful exploitation of this vulnerability enables attackers to execute arbitrary code remotely on the affected router. This can lead to unauthorized control over the device, allowing the attacker to manipulate network traffic, compromise connected devices, or launch further attacks within the network.

2. Data Breach Risks: Given that routers often serve as gateways for internal networks, exploiting this vulnerability can lead to exposure of sensitive data transmitted over the network. Attackers may gain access to confidential information, including personal data, financial details, or proprietary business information.

3. Increased Malware Propagation: The ability to gain control over the router can facilitate the deployment of malware, including ransomware, across the entire network. Once compromised, the attacker could use the router to spread malicious software to connected devices, heightening the risk of a widespread infection and potential system outages for organizations.

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