# CVE-2025-50647: D-Link DI-8003 buffer overflow in qos.asp

Source: https://junglewise.ai/threats/cve-2025-50647-d-link-di-8003-buffer-overflow-in-qos-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-2025-50647 · 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 allows a remote attacker to crash the device by sending specially crafted data to its management interface. Because this product has reached its end-of-life (EOL) status, D-Link will not be providing a security patch, and continued use of the device poses a risk to network availability.

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-2025-50647 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-50647 being exploited in the wild.

**How severe is CVE-2025-50647?** 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 and all hardware revisions.

**Is there a fix for CVE-2025-50647?** 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-2025-50647 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-50647?** 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 version 16.07.26A1. The vulnerability is located in the qos.asp endpoint, which fails to properly validate the length of the 'wans' parameter before copying it into a fixed-size buffer. An unauthenticated attacker can exploit this over the network to trigger a crash, leading to a denial-of-service (DoS) state. As the DI-8003 is an End-of-Life (EOL) product, no official patches are expected; the vendor recommends retiring the affected hardware.

## Affected products

- D-Link DI-8003 16.07.26A1 and all hardware revisions

## Timeline

- 2026-04-08: disclosed: Initial disclosure date
- 2026-04-15: advisory: Vendor advisory SAP10505 published confirming EOL status

## References

- [https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md](https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md)
- [https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10505](https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10505)
- [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 wan_ping.asp](https://junglewise.ai/threats/cve-2025-50669-d-link-di-8003-buffer-overflow-in-wan-ping-asp)