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CVE-2026-11522— Tenda W20E setPortMirror formSetPortMirror stack-based overflow

Quick assessment

Affected
Tenda W20E
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 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，该漏洞源于文件/goform/setPortMirror中函数formSetPortMirror对参数portMirrorMirroredPorts的操作，可能导致栈缓冲区溢出。攻击者可远程发起攻击。

CVSS 8.8 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tenda W20E 15.11.0.6 affected
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I. Basic Information for CVE-2026-11522

Vulnerability Information
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Vulnerability Title
Tenda W20E setPortMirror formSetPortMirror stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in Tenda W20E 15.11.0.6. This vulnerability affects the function formSetPortMirror of the file /goform/setPortMirror. Performing a manipulation of the argument portMirrorMirroredPorts results in stack-based buffer overflow. The attack can be initiated remotely. The exploit is now 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 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，该漏洞源于文件/goform/setPortMirror中函数formSetPortMirror对参数portMirrorMirroredPorts的操作，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

Vendor Product Affected Versions CPE Subscribe
Tenda W20E 15.11.0.6 cpe:2.3:o:tenda:w20e_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11522

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6029 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-2026-11522

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Other References for CVE-2026-11522 (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-2026-11523 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-2026-11556 8.8 HIGH Tenda F451 Web Management WriteFacMac formWriteFacMac os command injection
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: W20E
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-11522

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