Buffer overflow in Edimax Br-6428ns
CVE-2026-9294
A vulnerability was identified in Edimax BR-6428NS 1.10. The impacted element is the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component POST Request Handler. Such manipulation of the argument pppUserName leads to buffer overflow. 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.003
Affected products
- Edimax Br-6428ns — versions 1.10
Weakness classification (CWE)
References
- vuldb.com/vuln/365241 (technical-description, vdb-entry)
- vuldb.com/vuln/365241/cti (signature, permissions-required)
- vuldb.com/submit/811533 (third-party-advisory)
- lavender-bicycle-a5a.notion.site/EDIMAX-BR-6428NS-formWanTcpipSetup-34b53a41781… (exploit)
Frequently asked questions
- What is CVE-2026-9294?
- CVE-2026-9294 is a high-severity vulnerability in Edimax Br-6428ns, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-05-23.
- How severe is CVE-2026-9294?
- High severity. CVSS v3 base score is 8.8 out of 10.