Is CVE-2026-9479 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9479 being exploited in the wild.

How severe is CVE-2026-9479?

High severity, with a CVSS score of 8.8, published 25 May 2026.

Is there a fix for CVE-2026-9479?

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-2026-9479 attacked?

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

Am I affected by CVE-2026-9479?

Check whether you run Edimax EW-7438RPn 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-2026-9479: Edimax EW-7438RPn stack overflow in formLogout

CVE-2026-9479 · Severity: high · CVSS 8.8 · Published 2026-05-25

A security vulnerability exists in the Edimax EW-7438RPn Wi-Fi extender, a device used to expand wireless network coverage. An attacker can exploit a flaw in the logout process to crash the device or potentially take full control of it. This could lead to a complete loss of internet connectivity for users relying on the extender and may allow unauthorized access to the local network.

Technologies: Edimax EW-7438RPn. Vendors: Edimax.

Quick answers

Is CVE-2026-9479 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9479 being exploited in the wild.
How severe is CVE-2026-9479?: High severity, with a CVSS score of 8.8, published 25 May 2026.
Which products and versions are affected?: Edimax EW-7438RPn 1.31.
Is there a fix for CVE-2026-9479?: 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-2026-9479 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9479?: Check whether you run Edimax EW-7438RPn 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 'webs' binary of the Edimax EW-7438RPn Wi-Fi extender (firmware version 1.31). The vulnerability is located in the 'formLogout' function within the '/goform/formLogout' endpoint. The 'submit-url' POST parameter is copied into a local stack variable without adequate bounds checking. A remote attacker with low privileges (authenticated) can provide an excessively long string to overwrite the return address on the stack. This can result in a Denial of Service (system crash) or arbitrary code execution. As of the advisory date, the vendor has not responded to the disclosure.

Affected products

Edimax EW-7438RPn 1.31

Timeline

2026-05-25: disclosed: Public disclosure of the vulnerability and PoC
2026-05-25: advisory: CVE-2026-9479 published

References

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