The vulnerability identified as CVE-2025-60556 affects the D-Link DIR600L Ax router firmware version FW116WWb01. It is a buffer overflow vulnerability located in the formSetWizard1 function, specifically triggered via the curTime parameter. Buffer overflow vulnerabilities occur when input data exceeds the allocated buffer size, potentially overwriting adjacent memory and allowing attackers to execute arbitrary code or crash the system. In this case, an attacker could craft malicious requests targeting the curTime parameter to exploit this flaw. The vulnerability does not currently have a CVSS score or publicly known exploits, and no patches have been released yet. The router model affected is commonly used in small office and home office environments, which often have less stringent security controls. The vulnerability could be exploited remotely if the router’s management interface is accessible from untrusted networks, leading to possible remote code execution or denial of service. The lack of authentication requirements or user interaction details is not explicitly stated, but given the nature of the vulnerability in a router’s web interface function, it is likely that exploitation could be performed remotely with minimal interaction. This elevates the risk profile significantly. The vulnerability was reserved in late September 2025 and published in late October 2025, indicating recent discovery and disclosure. The absence of patches and known exploits suggests that attackers may not yet be actively exploiting this flaw, but the risk remains high due to the potential impact and ease of exploitation.

For European organizations, the impact of CVE-2025-60556 could be significant, especially for small and medium-sized enterprises (SMEs) and home office users relying on the D-Link DIR600L Ax router. Successful exploitation could lead to unauthorized remote code execution, allowing attackers to gain control over the router, intercept or manipulate network traffic, and potentially pivot to internal networks. This compromises confidentiality, integrity, and availability of network resources. Disruption of internet connectivity or network services could result in operational downtime and loss of productivity. Additionally, compromised routers could be used as footholds for further attacks or as part of botnets for distributed denial-of-service (DDoS) attacks. The absence of patches increases the window of exposure, and organizations with exposed router management interfaces are at higher risk. The impact is heightened in environments where network segmentation and monitoring are weak, common in smaller organizations. Given the widespread use of D-Link routers in Europe, the threat could affect a broad range of users, from residential customers to small businesses, potentially leading to data breaches and service interruptions.

To mitigate CVE-2025-60556, organizations should immediately restrict access to the router’s management interface by disabling remote administration or limiting it to trusted IP addresses. Network segmentation should be implemented to isolate routers from critical internal systems. Monitoring network traffic for unusual patterns or spikes can help detect exploitation attempts. Administrators should regularly audit router configurations and disable unnecessary services or features that expose the device to external networks. Since no patches are currently available, organizations should maintain close communication with D-Link for firmware updates and apply them promptly once released. Employing intrusion detection/prevention systems (IDS/IPS) that can identify buffer overflow attempts targeting router interfaces is recommended. Additionally, educating users about the risks of exposing router management interfaces and encouraging secure password practices can reduce exploitation likelihood. For high-risk environments, consider replacing affected devices with models that have no known vulnerabilities or have received timely security updates.