Is CVE-2026-9399 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9399 being exploited in the wild.

How severe is CVE-2026-9399?

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

Is there a fix for CVE-2026-9399?

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-2026-9399 attacked?

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

Am I affected by CVE-2026-9399?

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-2026-9399: Edimax BR-6675nD buffer overflow in formsetPPPoE

CVE-2026-9399 · Severity: high · CVSS 8.8 · Published 2026-05-24

A security vulnerability exists in the Edimax BR-6675nD wireless router. An attacker can exploit this flaw to cause a system crash or potentially take full control of the device by sending a specially crafted network request. This could lead to a complete loss of internet connectivity or unauthorized access to the local network.

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

Quick answers

Is CVE-2026-9399 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9399 being exploited in the wild.
How severe is CVE-2026-9399?: 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-2026-9399?: 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-2026-9399 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9399?: 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 'formsetPPPoE' function in the '/goform/formsetPPPoE' file, which serves as a POST request handler. By manipulating the 'pppUserName' argument, a remote attacker with low privileges can trigger the 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. As of the advisory date, the vendor has not responded to disclosure attempts, and no patch is currently available.

Affected products

Edimax BR-6675nD 1.12

Timeline

2026-05-24: advisory: Initial disclosure of the vulnerability
2026-05-24: disclosed: Exploit code made public

References

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