Stack-Based Buffer Overflow in Edimax EW-7438RPn Router
CVE-2026-9459

8.7HIGH

Key Information:

Vendor

Edimax

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9459?

A security flaw in Edimax EW-7438RPn version 1.31 allows for a stack-based buffer overflow due to improper handling of parameters in the formConnectionSetting function of the /goform/formConnectionSetting file. This vulnerability can be exploited remotely by manipulating the max_Conn and timeOut arguments, potentially leading to arbitrary code execution. The exploit details have been publicly disclosed, yet the vendor failed to respond to early warnings regarding this issue.

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-2026-9459 - Proof of Concept

References

https://vuldb.com/vuln/365440
vdb-entrytechnical-description
https://vuldb.com/vuln/365440/cti
signaturepermissions-required
https://vuldb.com/submit/813896
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
.