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CVE-2025-50661 D-Link CVE debrief

CVE-2025-50661 is a buffer overflow vulnerability in D-Link DI-8003 16.07.26A1. The vulnerability exists due to improper handling of multiple parameters in the /url_rule.asp endpoint. 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 vulnerability has a high impact on affected systems, and security teams should review vendor guidance for mitigation.

Vendor
D-Link
Product
DI-8003
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-25
Advisory published
2026-04-08
Advisory updated
2026-07-25

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-50661 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-50661

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-50661 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-50661

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.