# CVE-2026-13583: Edimax EW-7478APC buffer overflow in formUSBFolder

Source: https://junglewise.ai/threats/cve-2026-13583-edimax-ew-7478apc-buffer-overflow-in-formusbfolder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-29. Updated: 2026-06-29  
License: CC BY 4.0 with a link back

CVE-2026-13583 · Severity: high · CVSS 8.8 · Published 2026-06-29

A security vulnerability has been identified in the Edimax EW-7478APC router, a device used to provide wireless networking and internet connectivity. An attacker can exploit this flaw to crash the device or potentially take full control of it by sending a specially crafted request to the router's USB management interface. This could lead to a total loss of internet availability, unauthorized access to the local network, or the interception of sensitive data.

Technologies: [Edimax EW-7478APC](https://junglewise.ai/threats/technologies/ew-7478apc). Vendors: [Edimax](https://junglewise.ai/threats/vendors/edimax).

## Quick answers

**Is CVE-2026-13583 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-13583 being exploited in the wild.

**How severe is CVE-2026-13583?** High severity, with a CVSS score of 8.8, published 29 June 2026.

**Which products and versions are affected?** Edimax EW-7478APC 1.04.

**Is there a fix for CVE-2026-13583?** 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-2026-13583 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-13583?** Check whether you run Edimax EW-7478APC 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 exists in the Edimax EW-7478APC firmware version 1.04 within the 'formUSBFolder' function of the POST request handler located at /goform/formUSBFolder. The vulnerability is triggered by insufficient validation of the 'ShareName' and 'SelectName' arguments. A remote attacker with low-level privileges (authenticated) can exploit this by sending a crafted POST request to the device. Successful exploitation can lead to arbitrary code execution or a denial-of-service (DoS) condition. Public exploit code has been disclosed, and the vendor has reportedly not responded to the disclosure.

## Affected products

- Edimax EW-7478APC 1.04

## Timeline

- 2026-06-29: advisory: NVD and VulDB published the vulnerability details.
- 2026-06-29: disclosed: Public exploit code has been disclosed.

## References

- [https://lavender-bicycle-a5a.notion.site/EDIMAX-EW-7478APC-formUSBFolder-34b53a41781f80d5b1f8ebce442de53f](https://lavender-bicycle-a5a.notion.site/EDIMAX-EW-7478APC-formUSBFolder-34b53a41781f80d5b1f8ebce442de53f)
- [https://vuldb.com/cve/CVE-2026-13583](https://vuldb.com/cve/CVE-2026-13583)
- [https://vuldb.com/submit/844118](https://vuldb.com/submit/844118)
- [https://vuldb.com/vuln/374589](https://vuldb.com/vuln/374589)
- [https://vuldb.com/vuln/374589/cti](https://vuldb.com/vuln/374589/cti)

## Related threats

- [Edimax EW-7478APC command injection in stainfo](https://junglewise.ai/threats/cve-2026-19963-edimax-ew-7478apc-command-injection-in-stainfo)
- [Edimax EW-7478APC command injection in setWAN](https://junglewise.ai/threats/cve-2026-19962-edimax-ew-7478apc-command-injection-in-setwan)
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- [Edimax EW-7478APC command injection in formWlbasic](https://junglewise.ai/threats/cve-2026-19960-edimax-ew-7478apc-command-injection-in-formwlbasic)
- [Edimax EW-7478APC stack buffer overflow in WAN configuration](https://junglewise.ai/threats/cve-2026-19959-edimax-ew-7478apc-stack-buffer-overflow-in-wan-configuration)