Buffer Overflow Vulnerability in Edimax BR-6675nD Router
CVE-2026-9401

8.7HIGH

Key Information:

Vendor

Edimax

Status
Br-6675nd
Vendor
CVE Published:
24 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9401?

A buffer overflow vulnerability exists in the Edimax BR-6675nD router, specifically in the formWanTcpipSetup function of the POST Request Handler located in /goform/formWanTcpipSetup. An attacker can manipulate the pppUserName argument to trigger this vulnerability, allowing for potential remote exploitation. This security flaw has been publicly disclosed, and despite early notification to the vendor, there has been no response or resolution. Users of the affected version should take immediate precautions to secure their devices.

Affected Version(s)

BR-6675nD 1.12

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-2026-9401 - Proof of Concept

References

https://vuldb.com/vuln/365382
vdb-entrytechnical-description
https://vuldb.com/vuln/365382/cti
signaturepermissions-required
https://vuldb.com/submit/811563
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

yhryhryhr_tu (VulDB User)
VulDB CNA Team
.