CVE-2026-10126: Edimax BR-6478AC buffer overflow in formQoS

CVE-2026-10126 · Severity: high · CVSS 8.8 · Published 2026-05-30

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 the router's operations. This could lead to a complete loss of internet access for connected users or allow an attacker to intercept network traffic.

Technologies: Edimax BR-6478AC. Vendors: Edimax.

Quick answers

Is CVE-2026-10126 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-10126 being exploited in the wild.
How severe is CVE-2026-10126?
High severity, with a CVSS score of 8.8, published 30 May 2026.
Which products and versions are affected?
Edimax BR-6478AC 1.23.
Is there a fix for CVE-2026-10126?
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-2026-10126 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-10126?
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, specifically within the 'formQoS' function located in the '/goform/formQoS' file. The vulnerability is triggered by insufficient validation of the 'selSSID' argument during a POST request. A remote attacker with low-level authentication can exploit this by providing an overly long string to the affected parameter, leading to memory corruption. This can result in a denial-of-service (DoS) condition or remote code execution (RCE). Public exploit code has been released for this vulnerability.

Affected products

  • Edimax BR-6478AC 1.23

Timeline

  • 2026-05-30: disclosed: Vulnerability disclosed and added to NVD dataset.
  • 2026-05-30: advisory

References

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