CVE-2025-50673: D-Link DI-8003 buffer overflow in /webgl.asp

CVE-2025-50673 · Severity: high · CVSS 7.5 · Published 2026-04-08

A security vulnerability has been identified in the D-Link DI-8003 enterprise router. This flaw could allow an attacker to crash the device remotely, leading to a total loss of internet connectivity and network services for the business. The issue stems from how the router processes specific web-based configuration requests, potentially disrupting operations until the device is manually restarted or patched.

Technologies: Dlink Di-8003, Dlink Di-8003 Firmware. Vendors: Dlink.

Quick answers

Is CVE-2025-50673 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-50673 being exploited in the wild.
How severe is CVE-2025-50673?
High severity, with a CVSS score of 7.5, published 8 April 2026.
Which products and versions are affected?
D-Link DI-8003 firmware 16.07.26A1.
Is there a fix for CVE-2025-50673?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-50673 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2025-50673?
Check whether you run Dlink Di-8003 or Dlink Di-8003 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A classic buffer overflow (CWE-120) exists in the D-Link DI-8003 router running firmware version 16.07.26A1. The vulnerability is located within the /webgl.asp endpoint and is triggered by improper length validation of the 'http_lanport' parameter. A remote, unauthenticated attacker can exploit this by sending a specially crafted HTTP request containing an overly long string in the affected parameter. Successful exploitation leads to memory corruption, typically resulting in a crash of the web management interface or the entire device (Denial of Service). While the current CVSS assessment focuses on availability, buffer overflows can sometimes be leveraged for remote code execution depending on the device's memory protections.

Affected products

  • D-Link DI-8003 firmware 16.07.26A1

Timeline

  • 2026-04-08: advisory: Initial NVD publication date
  • 2026-07-25: other: Last modified date in NVD record

References

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