RCE in Edimax Br-6478ac
CVE-2026-9440
A vulnerability was identified in Edimax BR-6478AC 1.23. Affected by this vulnerability is the function formAccept of the file /goform/formAccept of the component POST Request Handler. Such manipulation of the argument submit-url leads to command injection. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.024 (83.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.130 · newest: 0.024 · change: -0.106
Affected products
- Edimax Br-6478ac — versions 1.23
Weakness classification (CWE)
References
- vuldb.com/vuln/365421 (technical-description, vdb-entry)
- vuldb.com/vuln/365421/cti (signature, permissions-required)
- vuldb.com/submit/818449 (third-party-advisory)
- lavender-bicycle-a5a.notion.site/EDIMAX-BR6478ACV2-formAccept-34b53a41781f80009… (exploit)
Frequently asked questions
- What is CVE-2026-9440?
- CVE-2026-9440 is a medium-severity vulnerability in Edimax Br-6478ac, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-05-25.
- How severe is CVE-2026-9440?
- Medium severity. CVSS v3 base score is 6.3 out of 10.