# CVE-2026-10165: Edimax BR-6478AC stack overflow in formWanTcpipSetup

Source: https://junglewise.ai/threats/cve-2026-10165-edimax-br-6478ac-stack-overflow-in-formwantcpipsetup  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-31. Updated: 2026-05-31  
License: CC BY 4.0 with a link back

CVE-2026-10165 · Severity: high · CVSS 8.8 · Published 2026-05-31

A security vulnerability has been identified in the Edimax BR-6478AC router, a device used to provide wireless internet connectivity. An attacker can exploit this flaw to crash the device or potentially take full control of its operations. This could lead to a complete loss of internet service for the network or unauthorized access to data passing through the router.

Technologies: [Edimax BR-6478AC](https://junglewise.ai/threats/technologies/br-6478ac). Vendors: [Edimax](https://junglewise.ai/threats/vendors/edimax).

## Quick answers

**Is CVE-2026-10165 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10165 being exploited in the wild.

**How severe is CVE-2026-10165?** High severity, with a CVSS score of 8.8, published 31 May 2026.

**Which products and versions are affected?** Edimax BR-6478AC 1.23.

**Is there a fix for CVE-2026-10165?** 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-2026-10165 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-10165?** Check whether you run Edimax BR-6478AC 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-6478AC router version 1.23 within the POST request handler. The flaw is located in the 'formWanTcpipSetup' function in the '/goform/formWanTcpipSetup' file. By sending a specially crafted POST request with a manipulated 'pppUserName' argument, a remote attacker with low privileges can trigger the overflow. This can lead to arbitrary code execution or a system crash (denial of service). Public exploit code is reportedly available, increasing the risk of exploitation.

## Affected products

- Edimax BR-6478AC 1.23

## Timeline

- 2026-05-31: advisory: Initial disclosure by VulDB and NVD

## References

- [https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formWanTcpipSetup-34b53a41781f8013a811da2b3c8b7aa3?source=copy_link](https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formWanTcpipSetup-34b53a41781f8013a811da2b3c8b7aa3?source=copy_link)
- [https://vuldb.com/submit/818601](https://vuldb.com/submit/818601)
- [https://vuldb.com/vuln/367419](https://vuldb.com/vuln/367419)
- [https://vuldb.com/vuln/367419/cti](https://vuldb.com/vuln/367419/cti)

## Related threats

- [Edimax BR-6478AC command injection in formWlbasic](https://junglewise.ai/threats/cve-2026-10166-edimax-br-6478ac-command-injection-in-formwlbasic)
- [Edimax BR-6478AC buffer overflow in formUSBFolder](https://junglewise.ai/threats/cve-2026-10164-edimax-br-6478ac-buffer-overflow-in-formusbfolder)
- [Edimax BR-6478AC buffer overflow in formUSBAccount](https://junglewise.ai/threats/cve-2026-10163-edimax-br-6478ac-buffer-overflow-in-formusbaccount)
- [Edimax BR-6478AC command injection in formStaDrvSetup](https://junglewise.ai/threats/cve-2026-10127-edimax-br-6478ac-command-injection-in-formstadrvsetup)
- [Edimax BR-6478AC buffer overflow in formQoS](https://junglewise.ai/threats/cve-2026-10126-edimax-br-6478ac-buffer-overflow-in-formqos)