CVE-2026-9459
Deferred Deferred - Pending Action

Stack-Based Buffer Overflow in Edimax EW-7438RPn Router

Vulnerability report for CVE-2026-9459, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-05-25

Last updated on: 2026-05-25

Assigner: VulDB

Description

A security flaw has been discovered in Edimax EW-7438RPn 1.31. This affects the function formConnectionSetting of the file /goform/formConnectionSetting. Performing a manipulation of the argument max_Conn/timeOut results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Scores

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Meta Information

Published
2026-05-25
Last Modified
2026-05-25
Generated
2026-07-06
AI Q&A
2026-05-26
EPSS Evaluated
2026-07-04
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
edimax ew-7438rpn 1.31

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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).
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.

Attack-Flow Graph

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Executive Summary

This vulnerability is a security flaw found in the Edimax EW-7438RPn device, specifically in the function formConnectionSetting within the file /goform/formConnectionSetting.

The flaw occurs when an attacker manipulates the argument max_Conn/timeOut, which leads to a stack-based buffer overflow.

This type of overflow can allow an attacker to execute arbitrary code or cause the device to crash.

The attack can be initiated remotely, meaning the attacker does not need physical access to the device.

Additionally, the exploit for this vulnerability has been publicly released, increasing the risk of attacks.

Impact Analysis

This vulnerability can have serious impacts including unauthorized remote code execution, which may allow attackers to take control of the affected device.

It can also lead to denial of service by causing the device to crash or become unresponsive.

Since the exploit is publicly available, the risk of exploitation is higher, potentially leading to compromised network security and data breaches.

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