Is CVE-2026-13563 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13563 being exploited in the wild.

How severe is CVE-2026-13563?

High severity, with a CVSS score of 8.8, published 29 June 2026.

Is there a fix for CVE-2026-13563?

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-2026-13563 attacked?

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

Am I affected by CVE-2026-13563?

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.

CVE-2026-13563: Edimax EW-7478APC stack buffer overflow in formL2TPSetup

CVE-2026-13563 · 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 could exploit this flaw to crash the device or potentially take full control of it by sending a specially crafted request to the router's configuration interface. This could lead to a complete loss of internet availability and unauthorized access to the network traffic passing through the device.

Technologies: Edimax EW-7478APC. Vendors: Edimax.

Quick answers

Is CVE-2026-13563 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13563 being exploited in the wild.
How severe is CVE-2026-13563?: 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-2026-13563?: 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-2026-13563 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-13563?: 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 vulnerability exists in the Edimax EW-7478APC router version 1.04. The flaw is located within the 'formL2TPSetup' function of the '/goform/formL2TPSetup' component, which handles POST requests. By providing a long string to the 'L2TPUserName' argument, an attacker can overflow the stack buffer. This attack can be launched remotely, though it typically requires low-level authentication (PR:L). Successful exploitation could lead to remote code execution (RCE) or a denial of service (DoS) condition. As of the advisory date, the vendor has not responded to the disclosure, and no official patch is available.

Affected products

Edimax EW-7478APC 1.04

Timeline

2026-06-29: advisory: NVD publication date
2026-06-29: disclosed: Public disclosure of the exploit

References

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