Buffer Overflow Vulnerability in Edimax BR-6478AC V2 Router
CVE-2026-12806

8.7HIGH

Key Information:

Vendor

Edimax

Status
Br-6478ac V2
Vendor
CVE Published:
21 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-12806?

A buffer overflow vulnerability has been identified in the Edimax BR-6478AC V2 router, specifically within the function formWlSiteSurvey located in the /goform/formWlSiteSurvey component. This security flaw arises from improper handling of the selSSID argument, which can be manipulated remotely, enabling potential attackers to exploit the device. Despite early notifications to the vendor regarding this issue, there has been no response, raising concerns about the device's security and the need for users to take preventive measures.

Affected Version(s)

BR-6478AC V2 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-2026-12806 - Proof of Concept

References

https://vuldb.com/vuln/372600
vdb-entrytechnical-description
https://vuldb.com/vuln/372600/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-12806
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
.