Stack-Based Buffer Overflow in Edimax EW-7438RPn by Edimax
CVE-2026-9427

8.7HIGH

Key Information:

Vendor

Edimax

Status
Ew-7438rpn
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9427?

A vulnerability exists in the Edimax EW-7438RPn model 1.31, specifically in the 'formWlSiteSurvey' function located in the '/goform/formWlSiteSurvey' component. This flaw allows an attacker to manipulate the 'selSSID/submit-url' arguments, potentially leading to a stack-based buffer overflow. This security issue can be exploited remotely, putting devices at risk. Despite prior notifications, the vendor has not addressed or acknowledged the issue as of this disclosure.

Affected Version(s)

EW-7438RPn 1.31

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-9427 - Proof of Concept

References

https://vuldb.com/vuln/365408
vdb-entrytechnical-description
https://vuldb.com/vuln/365408/cti
signaturepermissions-required
https://vuldb.com/submit/813895
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Buoy (VulDB User)
VulDB CNA Team
.