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CVE-2026-11556— Tenda F451 Web Management WriteFacMac formWriteFacMac os command injection

Quick assessment

Affected
Tenda F451
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 F451是中国腾达（Tenda）公司的一款无线路由器。 Tenda F451 1.0.0.7版本和1.0.0.9版本存在命令注入漏洞，该漏洞源于Web Management Interface组件中/goform/WriteFacMac文件的formWriteFacMac函数对参数mac操作不当，可能导致OS命令注入。攻击者可远程发起攻击。

CVSS 8.8 · High EPSS 1.61% · P75

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Tenda F451 1.0.0.7 affected
1.0.0.9 affected
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I. Basic Information for CVE-2026-11556

Vulnerability Information
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Vulnerability Title
Tenda F451 Web Management WriteFacMac formWriteFacMac os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in Tenda F451 1.0.0.7/1.0.0.9. Impacted is the function formWriteFacMac of the file /goform/WriteFacMac of the component Web Management Interface. Performing a manipulation of the argument mac results in os command injection. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.
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
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda F451 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda F451是中国腾达（Tenda）公司的一款无线路由器。 Tenda F451 1.0.0.7版本和1.0.0.9版本存在命令注入漏洞，该漏洞源于Web Management Interface组件中/goform/WriteFacMac文件的formWriteFacMac函数对参数mac操作不当，可能导致OS命令注入。攻击者可远程发起攻击。
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 F451 1.0.0.7 cpe:2.3:o:tenda:f451_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11556

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5419 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-11556

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Proof of Concept for CVE-2026-11556 (1)

Same Patch Batch · Tenda · 2026-06-08 · 12 CVEs total

CVE-2026-11499 9.8 CRITICAL Tenda HG7/HG9/HG10 formDOMAINBLK stack-based overflow
CVE-2026-11498 8.8 HIGH Tenda HG7/HG9/HG10 Web Management voip_other_set asp_voip_OtherSet stack-based overflow
CVE-2026-11503 8.8 HIGH Tenda CX12L Wi-Fi Configuration Endpoint fast_setting_wifi_set form_fast_setting_wifi_set
CVE-2026-11504 8.8 HIGH Tenda CX12L Wi-Fi Schedule Configuration Endpoint openSchedWifi setSchedWifi stack-based o
CVE-2026-11522 8.8 HIGH Tenda W20E setPortMirror formSetPortMirror stack-based overflow
CVE-2026-11523 8.8 HIGH Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow
CVE-2026-11524 8.8 HIGH Tenda W20E Web Management modifyWifiFilterRules stack-based overflow
CVE-2026-11528 8.8 HIGH Tenda AC18 Web Management getRebootStatus sub_45304 stack-based overflow
CVE-2026-11553 8.8 HIGH Tenda HG7/HG9/HG10 formPPPEdit stack-based overflow
CVE-2026-11557 8.8 HIGH Tenda F451 Web Management Natlimit fromNatlimit stack-based overflow
CVE-2026-11493 5.0 MEDIUM Tenda AC15 Samba smb.conf weak password

IV. Related Vulnerabilities

Same product: F451
Same vendor: Tenda
Same weakness: CWE-78

V. Comments for CVE-2026-11556

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