CVE-2026-9426
Deferred Deferred - Pending Action
Stack-Based Buffer Overflow in Edimax EW-7438RPn Router

Publication date: 2026-05-25

Last updated on: 2026-05-25

Assigner: VulDB

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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-25
Last Modified
2026-05-25
Generated
2026-06-15
AI Q&A
2026-05-26
EPSS Evaluated
2026-06-14
NVD
CVE-2026-9426
EUVD
EUVD-2026-31632
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
edimax ew-7438rpn 1.31
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in the Edimax EW-7438RPn device, specifically in the function formHwSet within the file /goform/formHwSet. It is caused by improper handling of several arguments (Anntena, Mcs, regDomain, nic0Addr, nic1Addr, wlanAddr, wanAddr, wlanSSID, wlanChan, initgain, txcck, txofdm, submit-url), which leads to a stack-based buffer overflow.

The vulnerability can be exploited remotely, meaning an attacker does not need physical access to the device to carry out the attack. The exploit code is publicly available, increasing the risk of exploitation.

The vendor was informed early about this issue but did not respond.

Impact Analysis

Exploitation of this vulnerability can lead to a stack-based buffer overflow, which may allow an attacker to execute arbitrary code on the affected device.

Because the attack can be performed remotely, it poses a significant security risk, potentially allowing unauthorized access, control over the device, or disruption of its normal operation.

The high CVSS scores (up to 9.0 in version 2.0) indicate a severe impact on confidentiality, integrity, and availability.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-9426. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart