# CVE-2025-50663: D-Link DI-8003 buffer overflow in /usb_paswd.asp

Source: https://junglewise.ai/threats/cve-2025-50663-d-link-di-8003-buffer-overflow-in-usb-paswd-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-2025-50663 · Severity: high · CVSS 7.5 · Published 2026-04-08

A security vulnerability has been identified in the D-Link DI-8003 router, a device used for network connectivity. An attacker could exploit this flaw to cause the device to crash or become unresponsive, leading to a total loss of internet or network availability. Because this product has reached its end-of-life status, the manufacturer will not be releasing a fix, and users are advised to replace the hardware.

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

## Quick answers

**Is CVE-2025-50663 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-50663 being exploited in the wild.

**How severe is CVE-2025-50663?** High severity, with a CVSS score of 7.5, published 8 April 2026.

**Which products and versions are affected?** D-Link DI-8003 hardware All series.

**Is there a fix for CVE-2025-50663?** 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-2025-50663 attacked?** It is attacked over the network.

**Am I affected by CVE-2025-50663?** Check whether you run D-Link DI-8003 hardware, Dlink Di-8003 or Dlink Di-8003 Firmware at an affected version. 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 stack-based buffer overflow (CWE-121) exists in the D-Link DI-8003 router running firmware version 16.07.26A1. The vulnerability is located within the /usb_paswd.asp endpoint and is triggered by improper validation of the 'name' parameter. A remote, unauthenticated attacker can exploit this over the network by sending a specially crafted request. Successful exploitation results in a denial-of-service (DoS) condition, impacting the availability of the device. No patch is available as the product is End-of-Life (EoL).

## Affected products

- D-Link DI-8003 firmware 16.07.26A1
- D-Link DI-8003 hardware All series

## Timeline

- 2026-04-08: disclosed
- 2026-04-08: advisory
- 2026-04-15: other: Vendor confirmed End-of-Life status and recommended replacement.

## 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)
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- [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)