CVE-2025-50661 D-Link CVE debrief

Who should care

Security teams and administrators responsible for D-Link DI-8003 devices should be aware of this vulnerability and take necessary actions to mitigate the risk. They should review vendor guidance, implement input validation and sanitization, and monitor network traffic for suspicious activity.

Technical summary

The vulnerability is caused by improper handling of multiple parameters in the /url_rule.asp endpoint of D-Link DI-8003 16.07.26A1. An attacker can exploit this vulnerability by sending a crafted HTTP GET request with parameters name, en, ips, u, time, act, rpri, and log. This can lead to a buffer overflow, potentially allowing the attacker to execute arbitrary code or crash the device. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.

Defensive priority

High

Recommended defensive actions

• Review and update D-Link DI-8003 firmware to the latest version
• Implement input validation and sanitization for user-supplied input
• Monitor network traffic for suspicious activity
• Consider implementing a web application firewall (WAF) to detect and prevent attacks
• Conduct regular security audits and vulnerability assessments
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-04-08T19:24:16.693Z and was last modified on 2026-07-25T10:10:00.167Z. The NVD entry is currently Modified. The vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of multiple parameters in the /url_rule.asp endpoint. Evidence of exploitation is not available, and defenders should verify affected scope and vendor guidance.

Official resources