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CVE-2026-11523— Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow

CVSS 8.8 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
TendaW20E15.11.0.6affected
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I. Basic Information for CVE-2026-11523

Vulnerability Information
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Vulnerability Title
Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Tenda W20E 15.11.0.6. This issue affects the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. Executing a manipulation of the argument gotoUrl can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been published 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 W20E 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda W20E是中国腾达（Tenda）公司的一款路由器。 Tenda W20E 15.11.0.6版本存在缓冲区错误漏洞，该漏洞源于Web Management Interface组件中/goform/PortalAuth文件的formPortalAuth函数对参数gotoUrl操作不当，可能导致栈缓冲区溢出。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

VendorProductAffected VersionsCPESubscribe
TendaW20E 15.11.0.6 cpe:2.3:o:tenda:w20e_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11523

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 8233 chars
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III. Intelligence Information for CVE-2026-11523

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Proof of Concept for CVE-2026-11523 (1)

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

CVE-2026-114999.8 CRITICALTenda HG7HG9/HG10 formDOMAINBLK stack-based overflow
CVE-2026-114988.8 HIGHTenda HG7HG9/HG10 Web Management voip_other_set asp_voip_OtherSet stack-based overflow
CVE-2026-115038.8 HIGHTenda CX12L Wi-Fi Configuration Endpoint fast_setting_wifi_set form_fast_setting_wifi_set
CVE-2026-115048.8 HIGHTenda CX12L Wi-Fi Schedule Configuration Endpoint openSchedWifi setSchedWifi stack-based o
CVE-2026-115228.8 HIGHTenda W20E setPortMirror formSetPortMirror stack-based overflow
CVE-2026-115248.8 HIGHTenda W20E Web Management modifyWifiFilterRules stack-based overflow
CVE-2026-115288.8 HIGHTenda AC18 Web Management getRebootStatus sub_45304 stack-based overflow
CVE-2026-115538.8 HIGHTenda HG7HG9/HG10 formPPPEdit stack-based overflow
CVE-2026-115568.8 HIGHTenda F451 Web Management WriteFacMac formWriteFacMac os command injection
CVE-2026-115578.8 HIGHTenda F451 Web Management Natlimit fromNatlimit stack-based overflow
CVE-2026-114935.0 MEDIUMTenda AC15 Samba smb.conf weak password

IV. Related Vulnerabilities

Same product: W20E
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-11523

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