# CVE-2026-9482: Edimax EW-7438RPn stack overflow in formSDHCP

Source: https://junglewise.ai/threats/cve-2026-9482-edimax-ew-7438rpn-stack-overflow-in-formsdhcp  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-25. Updated: 2026-05-26  
License: CC BY 4.0 with a link back

CVE-2026-9482 · Severity: high · CVSS 8.8 · Published 2026-05-25

A security vulnerability exists in the Edimax EW-7438RPn Wi-Fi extender. This device is used to expand wireless network coverage in homes and small offices. An attacker can exploit this flaw to crash the device or potentially take full control of it, leading to a complete loss of internet connectivity and potential access to the local network.

Technologies: [Edimax EW-7438RPn](https://junglewise.ai/threats/technologies/ew-7438rpn). Vendors: [Edimax](https://junglewise.ai/threats/vendors/edimax).

## Quick answers

**Is CVE-2026-9482 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9482 being exploited in the wild.

**How severe is CVE-2026-9482?** 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-2026-9482?** 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-2026-9482 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-9482?** 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 flaw is located within the 'formSDHCP' function in the '/goform/formSDHCP' endpoint. The root cause is a lack of bounds checking on the 'submit-url' POST parameter, which is copied directly into a local stack variable. A remote attacker with low privileges (authenticated) can provide an oversized string to overwrite the return address on the stack, leading to arbitrary code execution or a persistent denial of service (device crash). As of the advisory date, the vendor has not responded to disclosure attempts.

## Affected products

- Edimax EW-7438RPn 1.31

## Timeline

- 2026-05-25: disclosed: Exploit disclosed to the public
- 2026-05-25: advisory

## References

- [https://github.com/wudipjq/my_vuln/blob/main/Edimax/vuln_20/20.md](https://github.com/wudipjq/my_vuln/blob/main/Edimax/vuln_20/20.md)
- [https://vuldb.com/submit/813904](https://vuldb.com/submit/813904)
- [https://vuldb.com/vuln/365463](https://vuldb.com/vuln/365463)
- [https://vuldb.com/vuln/365463/cti](https://vuldb.com/vuln/365463/cti)

## Related threats

- [Edimax EW-7438RPn stack overflow in formStats](https://junglewise.ai/threats/cve-2026-9481-edimax-ew-7438rpn-stack-overflow-in-formstats)
- [Edimax EW-7438RPn stack overflow in formrefresh](https://junglewise.ai/threats/cve-2026-9480-edimax-ew-7438rpn-stack-overflow-in-formrefresh)
- [Edimax EW-7438RPn stack overflow in formLogout](https://junglewise.ai/threats/cve-2026-9479-edimax-ew-7438rpn-stack-overflow-in-formlogout)
- [Edimax EW-7438RPn stack overflow in formLicence](https://junglewise.ai/threats/cve-2026-9463-edimax-ew-7438rpn-stack-overflow-in-formlicence)
- [Edimax EW-7438RPn stack overflow in formWpsProxyEnable](https://junglewise.ai/threats/cve-2026-9462-edimax-ew-7438rpn-stack-overflow-in-formwpsproxyenable)