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CVE-2026-9389— Tenda F456 L7Im frmL7ImForm buffer overflow

Quick assessment

Affected
Tenda F456
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 F456是中国腾达（Tenda）公司的一款无线路由器。 Tenda F456 1.0.0.5版本存在安全漏洞，该漏洞源于文件/goform/L7Im中函数frmL7ImForm的参数page操作不当，可能导致远程缓冲区溢出攻击。

CVSS 8.8 · High EPSS 0.79% · P55

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tenda F456 1.0.0.5 affected
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I. Basic Information for CVE-2026-9389

Vulnerability Information
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Vulnerability Title
Tenda F456 L7Im frmL7ImForm buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in Tenda F456 1.0.0.5. This affects the function frmL7ImForm of the file /goform/L7Im. The manipulation of the argument page leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed publicly 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
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 F456 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda F456是中国腾达（Tenda）公司的一款无线路由器。 Tenda F456 1.0.0.5版本存在安全漏洞，该漏洞源于文件/goform/L7Im中函数frmL7ImForm的参数page操作不当，可能导致远程缓冲区溢出攻击。
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
Tenda F456 1.0.0.5 cpe:2.3:o:tenda:f456_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9389

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9331 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2026-9389

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Proof of Concept for CVE-2026-9389 (1)

IV. Related Vulnerabilities

Same product: F456
Same vendor: Tenda
Same weakness: CWE-120

V. Comments for CVE-2026-9389

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