CVE-2025-7194 is a critical stack-based buffer overflow vulnerability identified in the D-Link DI-500WF router, specifically version 17.04.10A1T. The vulnerability resides in the jhttpd component, within the ip_position.asp file, where the sprintf function improperly handles the 'ip' argument. This improper handling allows an attacker to overflow the stack buffer by supplying a specially crafted IP argument. The vulnerability is remotely exploitable without requiring user interaction or prior authentication, as indicated by the CVSS vector (AV:N/AC:L/AT:N/UI:N/PR:L). The exploit can lead to significant confidentiality, integrity, and availability impacts, including potential remote code execution, denial of service, or unauthorized control over the device. Although no known exploits are currently observed in the wild, the public disclosure of the exploit code increases the risk of imminent attacks. The vulnerability's CVSS 4.0 score is 8.7 (high severity), reflecting its ease of exploitation and the critical impact on affected systems. The D-Link DI-500WF is a consumer and small office/home office (SOHO) wireless router, which is commonly deployed in various environments. The vulnerability's exploitation could allow attackers to compromise network infrastructure, intercept or manipulate traffic, and pivot to internal networks.

For European organizations, this vulnerability poses a significant threat, especially to small and medium enterprises (SMEs) and home office setups that rely on the D-Link DI-500WF router for network connectivity. Successful exploitation could lead to unauthorized access to internal networks, data breaches, disruption of business operations due to device compromise or denial of service, and potential lateral movement within corporate networks. Given the router's role as a gateway device, attackers could intercept sensitive communications or inject malicious payloads into the network traffic. The lack of required user interaction and remote exploitability increases the risk of widespread attacks. Critical infrastructure or organizations with remote workforce setups using this device are particularly vulnerable. The public availability of exploit code further elevates the threat level, necessitating urgent mitigation to prevent exploitation.

1. Immediate firmware upgrade: Organizations should verify if D-Link has released a patched firmware version for the DI-500WF and apply it promptly. 2. Network segmentation: Isolate vulnerable devices from critical network segments to limit potential lateral movement if compromised. 3. Access control: Restrict remote management interfaces and disable unnecessary services on the router to reduce the attack surface. 4. Intrusion detection: Deploy network monitoring and intrusion detection systems to identify anomalous traffic patterns indicative of exploitation attempts targeting the ip_position.asp endpoint. 5. Replace legacy devices: Where possible, phase out the affected router model in favor of devices with active vendor support and security updates. 6. Incident response readiness: Prepare to detect and respond to potential exploitation attempts, including logging and alerting on suspicious activities related to the router. 7. User awareness: Inform users about the risks of using outdated firmware and encourage prompt updates.