CVE-2025-60569 is a buffer overflow vulnerability identified in the D-Link DIR600L Ax router firmware version FW116WWb01. The flaw exists in the formSetRoute function, specifically through improper handling of the curTime parameter. Buffer overflow vulnerabilities occur when input data exceeds the buffer's storage capacity, overwriting adjacent memory and potentially allowing attackers to execute arbitrary code or cause denial of service. In this case, an attacker could craft malicious input targeting the curTime parameter to trigger the overflow. The vulnerability does not currently have a CVSS score or available patches, and no exploits have been reported in the wild, indicating it may be newly discovered or not yet weaponized. The affected device, D-Link DIR600L Ax, is a consumer-grade router commonly used in home and small office networks, which often lack robust security controls. Exploitation could allow attackers to gain unauthorized control over the router, manipulate routing configurations, intercept or redirect network traffic, or launch further attacks within the network. The absence of authentication requirements or user interaction details is not specified, but buffer overflow vulnerabilities in router management functions often can be exploited remotely if the management interface is exposed. This vulnerability highlights the importance of secure firmware development and timely patching in network infrastructure devices.

For European organizations, exploitation of this vulnerability could lead to significant network security breaches. Compromise of the router would allow attackers to intercept sensitive data, disrupt network availability, or pivot to internal systems, undermining confidentiality, integrity, and availability. Small and medium enterprises (SMEs) and home office environments using the D-Link DIR600L Ax are particularly at risk due to typically weaker network defenses and less frequent firmware updates. The impact extends to potential data breaches, loss of business continuity, and reputational damage. Critical infrastructure or organizations relying on these routers for remote connectivity could face operational disruptions. Additionally, the lack of patches increases the window of exposure, emphasizing the need for proactive mitigation. Given the router’s role as a network gateway, successful exploitation could facilitate lateral movement and broader compromise within organizational networks.

Organizations should immediately audit their networks to identify the presence of D-Link DIR600L Ax routers running the vulnerable firmware version FW116WWb01. Until an official patch is released, restrict access to the router’s management interface by disabling remote management features and limiting local network access via firewall rules or VLAN segmentation. Implement network-level protections such as intrusion detection/prevention systems (IDS/IPS) to monitor for anomalous traffic targeting router management functions. Regularly check D-Link’s official channels for firmware updates and apply patches promptly once available. Consider replacing vulnerable devices with models that have a strong security track record if patching is delayed. Educate users and administrators about the risks of exposing router management interfaces to untrusted networks. Employ network segmentation to isolate critical systems from potentially compromised routers. Finally, maintain up-to-date backups of router configurations to enable rapid recovery if compromise occurs.