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CVE-2026-8775— Edimax BR-6428NS POST Request formL2TPSetup buffer overflow

Quick assessment

Affected
Edimax BR-6428NS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Edimax BR-6428nS是中国讯舟（Edimax）公司的一款无线路由器。 Edimax BR-6428NS v4_1.10版本存在缓冲区错误漏洞，该漏洞源于POST Request Handler组件中文件/goform/formL2TPSetup的函数formL2TPSetup对参数L2TPUserName的操作导致缓冲区溢出，可能允许远程攻击。

CVSS 8.8 · High EPSS 0.80% · P56

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Edimax BR-6428NS 1.10 affected
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I. Basic Information for CVE-2026-8775

Vulnerability Information
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Vulnerability Title
Edimax BR-6428NS POST Request formL2TPSetup buffer overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Edimax BR-6428nS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Edimax BR-6428nS是中国讯舟（Edimax）公司的一款无线路由器。 Edimax BR-6428NS v4_1.10版本存在缓冲区错误漏洞，该漏洞源于POST Request Handler组件中文件/goform/formL2TPSetup的函数formL2TPSetup对参数L2TPUserName的操作导致缓冲区溢出，可能允许远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Edimax BR-6428NS 1.10 cpe:2.3:o:edimax:br-6428ns_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-8775

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III. Intelligence Information for CVE-2026-8775

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Same Patch Batch · Edimax · 2026-05-18 · 4 CVEs total

CVE-2026-8776 8.8 HIGH Edimax BR-6428NS POST Request formPPTPSetup buffer overflow
CVE-2026-8777 6.3 MEDIUM Edimax BR-6428NS POST Request formStaDrvSetup command injection
CVE-2026-8774 6.3 MEDIUM Edimax BR-6228NC POST Request mp command injection

IV. Related Vulnerabilities

Same product: BR-6428NS
Same vendor: Edimax
Same weakness: CWE-120

V. Comments for CVE-2026-8775

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