CVE-2026-8775
Received Received - Intake

Buffer Overflow in Edimax BR-6428NS Firmware via L2TPUserName

Publication date: 2026-05-18

Last updated on: 2026-05-18

Assigner: VulDB

Description
A flaw has been found in Edimax BR-6428NS 1.10. This affects the function formL2TPSetup of the file /goform/formL2TPSetup of the component POST Request Handler. This manipulation of the argument L2TPUserName causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-05-18
Last Modified
2026-05-18
Generated
2026-06-30
AI Q&A
2026-05-18
EPSS Evaluated
2026-06-28
NVD
CVE-2026-8775

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
edimax br-6428ns 1.10

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is a buffer overflow flaw found in the Edimax BR-6428NS device, specifically in the function formL2TPSetup within the POST Request Handler component. The issue arises from improper handling of the L2TPUserName argument, which can be manipulated to cause a buffer overflow.

An attacker can exploit this vulnerability remotely, meaning they do not need physical access to the device to initiate the attack. The exploit code has been published, increasing the risk of exploitation.

Impact Analysis

Exploitation of this buffer overflow vulnerability can lead to severe impacts including unauthorized control over the affected device. Given the high CVSS scores, the vulnerability can result in complete compromise of confidentiality, integrity, and availability of the device.

  • Remote attackers may execute arbitrary code.
  • Attackers can disrupt device operations or cause denial of service.
  • Sensitive information on the device may be exposed or altered.

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