# CVE-2026-9440: Edimax BR-6478AC command injection in formAccept

Source: https://junglewise.ai/threats/cve-2026-9440-edimax-br-6478ac-command-injection-in-formaccept  
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-2026-9440 · Severity: medium · CVSS 6.3 · Published 2026-05-25

A security vulnerability exists in the Edimax BR-6478AC router, a device used to provide wireless internet connectivity. An attacker can remotely send specially crafted instructions to the router to take control of the device. This could allow an unauthorized person to disrupt internet service, intercept network traffic, or use the router as a foothold to attack other devices on the local network.

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

## Quick answers

**Is CVE-2026-9440 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9440 being exploited in the wild.

**How severe is CVE-2026-9440?** Medium severity, with a CVSS score of 6.3, published 25 May 2026.

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

**Is there a fix for CVE-2026-9440?** 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-2026-9440 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-9440?** 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 command injection vulnerability exists in the Edimax BR-6478AC router version 1.23 within the POST request handler component. Specifically, the 'formAccept' function in the '/goform/formAccept' file fails to properly sanitize the 'submit-url' argument. A remote attacker with low privileges can exploit this by sending a crafted POST request to inject and execute arbitrary shell commands on the underlying operating system. While the vendor was notified, no patch has been released, and public exploit code is reportedly available.

## Affected products

- Edimax BR-6478AC 1.23

## Timeline

- 2026-05-25: advisory: Initial disclosure by VulDB and NVD
- 2026-05-25: disclosed: Public exploit code made available

## References

- [https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formAccept-34b53a41781f800093ccd3404dbc4461?source=copy_link](https://lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formAccept-34b53a41781f800093ccd3404dbc4461?source=copy_link)
- [https://vuldb.com/submit/818449](https://vuldb.com/submit/818449)
- [https://vuldb.com/vuln/365421](https://vuldb.com/vuln/365421)
- [https://vuldb.com/vuln/365421/cti](https://vuldb.com/vuln/365421/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 stack overflow in formWanTcpipSetup](https://junglewise.ai/threats/cve-2026-10165-edimax-br-6478ac-stack-overflow-in-formwantcpipsetup)
- [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)