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CVE-2025-7796— Tenda FH451 PPTPDClient fromPptpUserAdd stack-based overflow

Quick assessment

Affected
Tenda FH451
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda FH451是中国腾达（Tenda）公司的一款路由器。 Tenda FH451 1.0.0.9版本存在安全漏洞，该漏洞源于对文件/goform/PPTPDClient中参数Username的错误操作导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 0.79% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-7796

Vulnerability Information
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Vulnerability Title
Tenda FH451 PPTPDClient fromPptpUserAdd stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as critical, was found in Tenda FH451 1.0.0.9. This affects the function fromPptpUserAdd of the file /goform/PPTPDClient. The manipulation of the argument Username leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
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
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda FH451 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda FH451是中国腾达（Tenda）公司的一款路由器。 Tenda FH451 1.0.0.9版本存在安全漏洞，该漏洞源于对文件/goform/PPTPDClient中参数Username的错误操作导致栈缓冲区溢出。
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 FH451 1.0.0.9 -

II. Public POCs for CVE-2025-7796

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7867 chars
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III. Intelligence Information for CVE-2025-7796

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Same Patch Batch · Tenda · 2025-07-18 · 8 CVEs total

CVE-2025-7807 8.8 HIGH Tenda FH451 SafeUrlFilter fromSafeUrlFilter stack-based overflow
CVE-2025-7806 8.8 HIGH Tenda FH451 SafeClientFilter fromSafeClientFilter stack-based overflow
CVE-2025-7805 8.8 HIGH Tenda FH451 PPTPUserSetting fromPptpUserSetting stack-based overflow
CVE-2025-7795 8.8 HIGH Tenda FH451 P2pListFilter fromP2pListFilter stack-based overflow
CVE-2025-7794 8.8 HIGH Tenda FH451 NatStaticSetting fromNatStaticSetting stack-based overflow
CVE-2025-7793 8.8 HIGH Tenda FH451 webtypelibrary formWebTypeLibrary stack-based overflow
CVE-2025-7792 8.8 HIGH Tenda FH451 SafeEmailFilter formSafeEmailFilter stack-based overflow

IV. Related Vulnerabilities

Same product: FH451
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2025-7796

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