CVE-2026-9426 Details
Description
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.
A stack-based buffer overflow vulnerability has been identified in the Edimax EW-7438RPn range extender, specifically in version 1.31. The issue arises in the 'formHwSet' function within the 'webs' binary, where several parameters, including 'Anntena', 'Mcs', 'regDomain', 'nic0Addr', 'nic1Addr', 'wlanAddr', 'wanAddr', 'wlanSSID', 'wlanChan', 'initgain', 'txcck', 'txofdm', and 'submit-url', are not properly validated before being processed. This lack of input validation allows remote attackers to manipulate these parameters, leading to a buffer overflow that can overwrite the function's return address and potentially execute arbitrary code. Exploitation of this vulnerability causes the device to crash and disrupts its normal functioning.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 25, 2026CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/wudipjq/my_vuln/blob/main/Edimax/vuln_10/10.md | [email protected] | ExploitTechnical Description |
| https://vuldb.com/submit/813894 | [email protected] | Permission Required |
| https://vuldb.com/vuln/365407 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/365407/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Edimax EW-7438RPn | 1.31 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 25, 2026 | New CVE Received | [email protected] |