# CVE-2026-10206: D-Link DI-8400 stack-based buffer overflow in /dbsrv.asp

Source: https://junglewise.ai/threats/cve-2026-10206-d-link-di-8400-stack-based-buffer-overflow-in-dbsrv-asp  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-01. Updated: 2026-06-01  
License: CC BY 4.0 with a link back

CVE-2026-10206 · Severity: high · CVSS 8.8 · Published 2026-06-01

A security vulnerability exists in the D-Link DI-8400 enterprise router. By sending a specially crafted web request to the device's management interface, an attacker can cause the system to crash or potentially take full control of the router. This could lead to a total loss of network connectivity or allow an unauthorized user to intercept and manipulate corporate network traffic.

Technologies: [D-Link DI-8400](https://junglewise.ai/threats/technologies/di-8400). Vendors: [D-Link](https://junglewise.ai/threats/vendors/d-link).

## Quick answers

**Is CVE-2026-10206 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10206 being exploited in the wild.

**How severe is CVE-2026-10206?** High severity, with a CVSS score of 8.8, published 1 June 2026.

**Which products and versions are affected?** D-Link DI-8400 up to 16.07.26A1.

**Is there a fix for CVE-2026-10206?** 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-2026-10206 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-10206?** Check whether you run D-Link DI-8400 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 vulnerability exists in the D-Link DI-8400 router firmware up to version 16.07.26A1. The flaw is located within the handling of HTTP POST requests to /dbsrv.asp, specifically involving the 'str' (or 'src') parameter. The application uses the unsafe 'strcpy' function to copy user-supplied input into a fixed-size stack buffer without performing adequate bounds checking. A remote attacker with low-level authentication (or potentially unauthenticated depending on session state) can exploit this to overwrite the return address on the stack, leading to arbitrary command execution or a denial of service (DoS). A public proof-of-concept exploit is available.

## Affected products

- D-Link DI-8400 up to 16.07.26A1

## Timeline

- 2026-05-31: disclosed: Initial disclosure via VulDB and GitHub repository
- 2026-06-01: advisory: CVE-2026-10206 published

## References

- [https://github.com/666324/dlink-di8400-vuln/tree/main/dlink-di8400-vuln](https://github.com/666324/dlink-di8400-vuln/tree/main/dlink-di8400-vuln)
- [https://vuldb.com/cve/CVE-2026-10206](https://vuldb.com/cve/CVE-2026-10206)
- [https://vuldb.com/submit/821716](https://vuldb.com/submit/821716)
- [https://vuldb.com/vuln/367486](https://vuldb.com/vuln/367486)
- [https://vuldb.com/vuln/367486/cti](https://vuldb.com/vuln/367486/cti)
- [https://www.dlink.com/](https://www.dlink.com/)

## Related threats

- [D-Link DI-8400 stack buffer overflow in Web Administration Service](https://junglewise.ai/threats/cve-2026-101081-a-security-flaw-has-been-discovered-in-d-link-di-8400-16-07-this)
- [D-Link DI-8400 stack buffer overflow in DDNS configuration](https://junglewise.ai/threats/cve-2026-91001-d-link-di-8400-stack-buffer-overflow-in-ddns-configuration)