Buffer Overflow Vulnerability in Edimax BR-6428NS Router
CVE-2026-8776

8.7HIGH

Key Information:

Vendor

Edimax

Status
Br-6428ns
Vendor
CVE Published:
18 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8776?

A buffer overflow vulnerability exists in the Edimax BR-6428NS router, specifically within the formPPTPSetup function of the POST Request Handler. This vulnerability is triggered by improper validation of the pptpUserName argument, potentially allowing remote attackers to manipulate the device. The issue has been publicly disclosed, and exploitation is possible due to the vendor's lack of response to the earlier notification regarding this vulnerability.

Affected Version(s)

BR-6428NS 1.10

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-2026-8776 - Proof of Concept

References

https://vuldb.com/vuln/364401
vdb-entrytechnical-description
https://vuldb.com/vuln/364401/cti
signaturepermissions-required
https://vuldb.com/submit/811531
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

wxhwxhwxh_tutu (VulDB User)
VulDB CNA Team
.