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CVE-2026-12806— Edimax BR-6478AC V2 POST Request formWlSiteSurvey buffer overflow

Quick assessment

Affected
Edimax BR-6478AC V2
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-6478ac v2是中国Edimax公司的一款无线宽带路由器。 Edimax BR-6478AC V2 1.23版本存在缓冲区错误漏洞，该漏洞源于文件/goform/formWlSiteSurvey中函数formWlSiteSurvey的POST Request Handler组件对参数selSSID的操作，容易受到缓冲区溢出攻击。

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-6478AC V2 1.23 affected
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I. Basic Information for CVE-2026-12806

Vulnerability Information
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Vulnerability Title
Edimax BR-6478AC V2 POST Request formWlSiteSurvey buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in Edimax BR-6478AC V2 1.23. The impacted element is the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component POST Request Handler. The manipulation of the argument selSSID leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public 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-6478ac v2 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Edimax br-6478ac v2是中国Edimax公司的一款无线宽带路由器。 Edimax BR-6478AC V2 1.23版本存在缓冲区错误漏洞，该漏洞源于文件/goform/formWlSiteSurvey中函数formWlSiteSurvey的POST Request Handler组件对参数selSSID的操作，容易受到缓冲区溢出攻击。
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-6478AC V2 1.23 cpe:2.3:a:edimax:br-6478ac_v2:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12806

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III. Intelligence Information for CVE-2026-12806

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Same Patch Batch · Edimax · 2026-06-21 · 5 CVEs total

CVE-2026-12807 6.3 MEDIUM Edimax BR-6478AC V2 POST Request setWAN command injection
CVE-2026-12808 6.3 MEDIUM Edimax BR-6478AC V2 POST Request stainfo command injection
CVE-2026-12809 6.3 MEDIUM Edimax BR-6478AC V2 POST Request wiz_5in1_redirect command injection
CVE-2026-12810 6.3 MEDIUM Edimax BR-6478AC V2 POST Request mp command injection

IV. Related Vulnerabilities

Same product: BR-6478AC V2
Same vendor: Edimax
Same weakness: CWE-120

V. Comments for CVE-2026-12806

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