Is CVE-2026-9403 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9403 being exploited in the wild.

How severe is CVE-2026-9403?

High severity, with a CVSS score of 8.8, published 24 May 2026.

Is there a fix for CVE-2026-9403?

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-2026-9403 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-9403?

Check whether you run Edimax BR-6675nD 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.

CVE-2026-9403: Edimax BR-6675nD buffer overflow in formWlSiteSurvey

CVE-2026-9403 · Severity: high · CVSS 8.8 · Published 2026-05-24

A security vulnerability exists in the Edimax BR-6675nD wireless router, a device used to provide internet connectivity and networking for homes and small offices. An attacker can exploit this flaw to crash the device or potentially take full control of it by sending a specially crafted web request. This could lead to a complete loss of internet service, unauthorized access to the local network, or the theft of sensitive data passing through the router.

Technologies: Edimax BR-6675nD. Vendors: Edimax.

Quick answers

Is CVE-2026-9403 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9403 being exploited in the wild.
How severe is CVE-2026-9403?: High severity, with a CVSS score of 8.8, published 24 May 2026.
Which products and versions are affected?: Edimax BR-6675nD 1.12.
Is there a fix for CVE-2026-9403?: 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-2026-9403 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9403?: Check whether you run Edimax BR-6675nD 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 Edimax BR-6675nD router version 1.12. The flaw is located within the 'formWlSiteSurvey' function of the '/goform/formWlSiteSurvey' endpoint, which handles POST requests. By manipulating the 'selSSID' argument, a remote attacker with low privileges can trigger a buffer overflow. This occurs due to improper restriction of operations within the bounds of a memory buffer (CWE-119/CWE-120). Successful exploitation can lead to remote code execution or a complete system crash. Although the vendor was notified, no patch has been released, and exploit details are publicly available.

Affected products

Edimax BR-6675nD 1.12

Timeline

2026-05-24: disclosed: Public disclosure of the vulnerability and exploit details.
2026-05-24: advisory: CVE-2026-9403 published.

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.