CVE-2025-13305 is a buffer overflow vulnerability identified in multiple D-Link router models, specifically DWR-M920, DWR-M921, DWR-M960, DIR-822K, and DIR-825M running firmware version 1.01.07. The vulnerability arises from improper handling of input parameters in the /boafrm/formTracerouteDiagnosticRun endpoint, where the 'host' argument is not properly validated or bounded, allowing an attacker to overflow the buffer. This overflow can lead to arbitrary code execution, potentially granting attackers control over the affected device. The attack vector is network-based (AV:N), requiring no user interaction (UI:N) and no authentication (PR:L indicates low privileges needed, but the vector suggests no authentication required), making it highly accessible to remote attackers. The vulnerability impacts confidentiality, integrity, and availability at a high level (VC:H, VI:H, VA:H), meaning attackers could intercept sensitive data, alter device configurations, or disrupt network services. The CVSS 4.0 score of 8.7 reflects these severe impacts. Although no active exploitation has been reported, the availability of a public exploit increases the likelihood of attacks. The affected devices are commonly used in small to medium enterprise and home networks, which may serve as entry points into larger organizational networks if compromised. The lack of official patches or updates linked in the provided data suggests that mitigation may currently rely on network-level controls or device replacement. The vulnerability's presence in multiple models broadens the attack surface, making it a significant concern for organizations relying on these devices for connectivity and network management.

For European organizations, this vulnerability poses a significant risk to network security and operational continuity. Exploitation could allow attackers to gain unauthorized control over routers, leading to interception or manipulation of network traffic, disruption of internet connectivity, and potential lateral movement within corporate networks. Critical infrastructure providers, SMEs, and enterprises using these D-Link models may face data breaches, service outages, or espionage. Given the remote exploitability without authentication, attackers could target exposed devices over the internet or compromised internal networks. The impact is heightened in sectors with stringent data protection requirements under GDPR, as unauthorized access could lead to data leakage and regulatory penalties. Additionally, compromised routers could be leveraged as part of botnets or for launching further attacks, amplifying the threat landscape. The absence of known active exploitation does not diminish the urgency, as public exploit availability lowers the barrier for attackers. Organizations relying on these devices for remote offices or critical communications are particularly vulnerable to operational disruptions and reputational damage.

To mitigate CVE-2025-13305, European organizations should first verify if their network infrastructure includes any of the affected D-Link models running firmware version 1.01.07. Immediate steps include isolating these devices from direct internet exposure by implementing strict firewall rules and network segmentation to limit access to the vulnerable endpoint. Employ network intrusion detection/prevention systems (IDS/IPS) to monitor and block suspicious traffic targeting the /boafrm/formTracerouteDiagnosticRun endpoint or unusual payloads indicative of buffer overflow attempts. If vendor patches become available, prioritize prompt firmware updates to the latest secure versions. In the absence of patches, consider replacing affected devices with models confirmed to be secure. Additionally, disable or restrict access to diagnostic or management interfaces remotely unless absolutely necessary, and enforce strong network access controls. Regularly audit device configurations and monitor logs for signs of exploitation attempts. Educate network administrators about this vulnerability and the importance of proactive device management. For organizations with large deployments, automate vulnerability scanning and device inventory to quickly identify and remediate affected units. Finally, coordinate with D-Link support channels for updates and advisories related to this vulnerability.