CVE-2026-9427
Deferred Deferred - Pending Action

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

Vulnerability report for CVE-2026-9427, 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 flaw has been found in Edimax EW-7438RPn 1.31. This impacts the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component webs. This manipulation of the argument selSSID/submit-url causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-05-25
Last Modified
2026-05-25
Generated
2026-07-05
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 stack-based buffer overflow found in the Edimax EW-7438RPn device, specifically in the function formWlSiteSurvey within the /goform/formWlSiteSurvey component called webs.

The issue arises from improper handling of the argument selSSID/submit-url, which can be manipulated remotely to cause the overflow.

An exploit for this vulnerability has been published, making it possible for attackers to leverage it.

Impact Analysis

The vulnerability allows remote attackers to cause a stack-based buffer overflow, which can lead to severe impacts such as executing arbitrary code, crashing the device, or gaining unauthorized control.

Given the high CVSS scores (up to 9.0 in version 2.0), the impact includes high confidentiality, integrity, and availability risks.

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