# CVE-2025-50669: D-Link DI-8003 buffer overflow in wan_ping.asp

Source: https://junglewise.ai/threats/cve-2025-50669-d-link-di-8003-buffer-overflow-in-wan-ping-asp  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2025-50669 · Severity: high · CVSS 7.5 · Published 2026-04-08

A security vulnerability has been identified in D-Link DI-8003 and DI-8003G enterprise routers. These devices are used to manage network traffic and provide internet connectivity for business environments. An attacker could exploit this flaw to crash the device, leading to a complete loss of internet and network services for all connected users.

Technologies: [Dlink Di-8003](https://junglewise.ai/threats/technologies/di-8003), [Dlink Di-8003 Firmware](https://junglewise.ai/threats/technologies/di-8003-firmware). Vendors: [Dlink](https://junglewise.ai/threats/vendors/dlink).

## Quick answers

**Is CVE-2025-50669 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-50669 being exploited in the wild.

**How severe is CVE-2025-50669?** High severity, with a CVSS score of 7.5, published 8 April 2026.

**Which products and versions are affected?** D-Link DI-8003 16.07.26A1; D-Link DI-8003G 19.12.10A1.

**Is there a fix for CVE-2025-50669?** 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-2025-50669 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-50669?** 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 (firmware 16.07.26A1) and DI-8003G (firmware 19.12.10A1) routers. The vulnerability is located within the /wan_ping.asp endpoint due to improper validation of the 'wan_ping' parameter. A remote, unauthenticated attacker can send a specially crafted network request to trigger the overflow. According to the CVSS metrics, the primary impact is on system availability (Denial of Service), though buffer overflows can sometimes lead to remote code execution depending on the underlying architecture and protections. Users are advised to check the D-Link security bulletin for firmware updates.

## Affected products

- D-Link DI-8003 16.07.26A1
- D-Link DI-8003G 19.12.10A1

## Timeline

- 2026-04-08: disclosed
- 2026-04-08: advisory

## References

- [https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md](https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md)
- [https://www.dlink.com/en/security-bulletin/](https://www.dlink.com/en/security-bulletin/)

## Related threats

- [D-Link DI-8003 buffer overflow in /webgl.asp](https://junglewise.ai/threats/cve-2025-50673-d-link-di-8003-buffer-overflow-in-webgl-asp)
- [D-Link DI-8003 buffer overflow in /yyxz_dlink.asp](https://junglewise.ai/threats/cve-2025-50672-d-link-di-8003-buffer-overflow-in-yyxz-dlink-asp)
- [D-Link DI-8003 buffer overflow in /xwgl_ref.asp](https://junglewise.ai/threats/cve-2025-50671-d-link-di-8003-buffer-overflow-in-xwgl-ref-asp)
- [D-Link DI-8003 buffer overflow in /xwgl_bwr.asp](https://junglewise.ai/threats/cve-2025-50670-d-link-di-8003-buffer-overflow-in-xwgl-bwr-asp)
- [D-Link DI-8003 buffer overflow in /web_list_opt.asp](https://junglewise.ai/threats/cve-2025-50668-d-link-di-8003-buffer-overflow-in-web-list-opt-asp)