Quick answers
- Is CVE-2026-12806 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-12806 being exploited in the wild.
- How severe is CVE-2026-12806?
- High severity, with a CVSS score of 8.8, published 21 June 2026.
- Which products and versions are affected?
- Edimax BR-6478AC V2 1.23.
- Is there a fix for CVE-2026-12806?
- 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-2026-12806 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-12806?
- Check whether you run Edimax BR-6478AC V2 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 V2 router running firmware version 1.23. The flaw is located within the formWlSiteSurvey function in the /goform/formWlSiteSurvey component, which handles POST requests. By manipulating the 'selSSID' argument, a remote attacker with low-level authentication can trigger the overflow. This can lead to arbitrary code execution or a system crash (denial of service). Although the vendor was notified, no patch has been released, and public exploit details are available.
Affected products
- Edimax BR-6478AC V2 1.23
Timeline
- 2026-06-21: disclosed: Public disclosure of the vulnerability and exploit details.
- 2026-06-21: advisory