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CVE-2026-85109— Tenda HG10 Boa Web Server formLogin buffer overflow

Quick assessment

Affected
Tenda HG10
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.

Tenda hg10 firmware是中国Tenda公司的一款信息化产品。 Tenda hg10 firmware 300001138版本存在缓冲区错误漏洞，该漏洞源于Boa Web Server组件中文件/boaform/formLogin的formLogin函数对Username参数操作不当，可能导致缓冲区溢出。攻击者可远程利用，漏洞利用代码已公开。

CVSS 9.8 · Critical EPSS 0.62% · P47

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tenda HG10 300001138 affected
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I. Basic Information for CVE-2026-85109

Vulnerability Information
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Vulnerability Title
Tenda HG10 Boa Web Server formLogin buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Tenda HG10 300001138. This issue affects the function formLogin of the file /boaform/formLogin of the component Boa Web Server. Executing a manipulation of the argument Username can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
Tenda hg10 firmware 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda hg10 firmware是中国Tenda公司的一款信息化产品。 Tenda hg10 firmware 300001138版本存在缓冲区错误漏洞，该漏洞源于Boa Web Server组件中文件/boaform/formLogin的formLogin函数对Username参数操作不当，可能导致缓冲区溢出。攻击者可远程利用，漏洞利用代码已公开。
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
Tenda HG10 300001138 cpe:2.3:o:tenda:hg10_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-85109

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III. Intelligence Information for CVE-2026-85109

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Proof of Concept for CVE-2026-85109 (1)

News Coverage for CVE-2026-85109 (1)

Other References for CVE-2026-85109 (2)

IV. Related Vulnerabilities

Same product: HG10
Same vendor: Tenda
Same weakness: CWE-120

V. Comments for CVE-2026-85109

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