Buffer Overflow Vulnerability in Edimax BR-6675nD Router
CVE-2026-9399

8.7HIGH

Key Information:

Vendor

Edimax

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9399?

A buffer overflow vulnerability has been identified in the Edimax BR-6675nD router, specifically within the formsetPPPoE function of the POST Request Handler located at /goform/formsetPPPoE. By manipulating the pppUserName argument, an attacker can trigger a buffer overflow, potentially leading to unauthorized access and control of the device. This vulnerability can be exploited remotely, and reports indicate that details of the exploit are publicly accessible. Despite efforts to inform Edimax of the issue, the company has not responded.

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-2026-9399 - Proof of Concept

References

https://vuldb.com/vuln/365380
vdb-entrytechnical-description
https://vuldb.com/vuln/365380/cti
signaturepermissions-required
https://vuldb.com/submit/811561
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
.