Buffer Overflow Vulnerability in Edimax BR-6478AC Router
CVE-2026-9442

8.7HIGH

Key Information:

Vendor

Edimax

Status
Br-6478ac
Vendor
CVE Published:
25 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9442?

A buffer overflow vulnerability has been detected in the Edimax BR-6478AC version 1.23, specifically within the function formiNICSiteSurvey found in the POST Request Handler. This vulnerability arises due to improper handling of the 'selSSID' argument, which can be manipulated remotely by an attacker. With the exploit already public, it raises significant security concerns, especially since the vendor failed to respond to notifications regarding this issue. Users of the Edimax BR-6478AC are advised to take immediate action to secure their devices against potential attacks.

Affected Version(s)

BR-6478AC 1.23

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-2026-9442 - Proof of Concept

References

https://vuldb.com/vuln/365423
vdb-entrytechnical-description
https://vuldb.com/vuln/365423/cti
signaturepermissions-required
https://vuldb.com/submit/818451
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_mie (VulDB User)
VulDB CNA Team
.