Buffer overflow in Edimax Ew-7438rpn
CVE-2026-9426
A vulnerability was detected in Edimax EW-7438RPn 1.31. This affects the function formHwSet of the file /goform/formHwSet. The manipulation of the argument Anntena/Mcs/regDomain/nic0Addr/nic1Addr/wlanAddr/wanAddr/wlanSSID/wlanChan/initgain/txcck/txofdm/submit-url results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now public and may 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: 0.004 · newest: 0.008 · change: +0.004
Affected products
- Edimax Ew-7438rpn — versions 1.31
Weakness classification (CWE)
References
- vuldb.com/vuln/365407 (technical-description, vdb-entry)
- vuldb.com/vuln/365407/cti (signature, permissions-required)
- vuldb.com/submit/813894 (third-party-advisory)
- github.com/wudipjq/my_vuln/blob/main/Edimax/vuln_10/10.md (exploit)
Frequently asked questions
- What is CVE-2026-9426?
- CVE-2026-9426 is a high-severity vulnerability in Edimax Ew-7438rpn, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-05-25.
- How severe is CVE-2026-9426?
- High severity. CVSS v3 base score is 8.8 out of 10.