Buffer Overflow Vulnerability in Edimax EW-7478APC Router
CVE-2026-19959

9.4CRITICAL

Key Information:

Vendor

Edimax

Status
Ew-7478apc
Vendor
CVE Published:
16 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19959?

A buffer overflow vulnerability has been identified in the Edimax EW-7478APC routing device, specifically within the function formWanTcpipSetup located at /goform/formWanTcpipSetup. The issue arises from improper handling of the pppUserName argument, allowing for stack-based buffer overflow conditions. This weakness can be exploited remotely, leading to significant security risks. Despite early notification to Edimax about this vulnerability, there has been no response. Exploit code is publicly available, heightening the urgency for users to secure their devices.

Affected Version(s)

EW-7478APC 1.04

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-2026-19959 - Proof of Concept

References

https://vuldb.com/vuln/391136
vdb-entrytechnical-description
https://vuldb.com/vuln/391136/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19959
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
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
.