Is CVE-2026-9480 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9480 being exploited in the wild.

How severe is CVE-2026-9480?

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

Is there a fix for CVE-2026-9480?

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-2026-9480 attacked?

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

Am I affected by CVE-2026-9480?

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-2026-9480: Edimax EW-7438RPn stack overflow in formrefresh

CVE-2026-9480 · 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 increase wireless network coverage. An attacker can send a specially crafted web request to the device to cause it to crash or potentially take full control of the hardware. This could lead to a total loss of internet connectivity through the extender and allow unauthorized access to the local network.

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

Quick answers

Is CVE-2026-9480 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9480 being exploited in the wild.
How severe is CVE-2026-9480?: 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-2026-9480?: 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-2026-9480 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9480?: 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 firmware version 1.31. The vulnerability is located in the 'formrefresh' function within the '/goform/formrefresh' endpoint. The 'submit-url' POST parameter is copied into a local stack buffer without adequate bounds checking, allowing an attacker to overwrite the function's return address. Exploitation requires network reachability and basic authentication (PR:L). Successful exploitation can lead to remote code execution (RCE) or a persistent denial of service (DoS) by crashing the device's web server. As of the advisory date, the vendor has not responded to disclosure attempts.

Affected products

Edimax EW-7438RPn 1.31

Timeline

2026-05-25: advisory: Vulnerability disclosed via VulDB and NVD
2026-05-25: disclosed: Public PoC released on GitHub

References

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