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CVE-2026-15486— TRENDnet TEW-821DAP Firmware Update tools_ddns sub_42026C os command injection

Quick assessment

Affected
TRENDnet TEW-821DAP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TRENDnet tew-821dap是美国TRENDnet公司的一款无线接入点。 TRENDnet TEW-821DAP 1.11B03版本存在命令注入漏洞，该漏洞源于Firmware Update Handler组件文件/goform/tools_ddns中参数hostname/username/password的操作，导致远程攻击者能够进行os命令注入。

CVSS 6.3 · Medium EPSS 1.07% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TRENDnet TEW-821DAP 1.11B03 affected
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I. Basic Information for CVE-2026-15486

Vulnerability Information
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Vulnerability Title
TRENDnet TEW-821DAP Firmware Update tools_ddns sub_42026C os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in TRENDnet TEW-821DAP 1.11B03. This affects the function sub_42026C of the file /goform/tools_ddns of the component Firmware Update Handler. Such manipulation of the argument hostname/username/password leads to os command injection. The attack can be launched remotely. The vendor explains: "We are unable to confirm the existence of the vulnerabilities for (...) TEW-821DAP (v1.0R) as these items have been EOL. " This vulnerability only affects products that are no longer supported by the maintainer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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
TRENDnet TEW-821DAP 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TRENDnet tew-821dap是美国TRENDnet公司的一款无线接入点。 TRENDnet TEW-821DAP 1.11B03版本存在命令注入漏洞，该漏洞源于Firmware Update Handler组件文件/goform/tools_ddns中参数hostname/username/password的操作，导致远程攻击者能够进行os命令注入。
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
TRENDnet TEW-821DAP 1.11B03 cpe:2.3:o:trendnet:tew-821dap_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-15486

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III. Intelligence Information for CVE-2026-15486

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Proof of Concept for CVE-2026-15486 (1)

Same Patch Batch · TRENDnet · 2026-07-12 · 7 CVEs total

CVE-2026-15484 8.8 HIGH TRENDnet TEW-821DAP ssi tools_nslookup sub_41EC14 buffer overflow
CVE-2026-15483 8.8 HIGH TRENDnet TEW-821DAP ssi tools_nslookup sub_41EC14 buffer overflow
CVE-2026-15481 8.8 HIGH Trendnet TEW-635BRM IPoA WAN Connection Setup rc ipoa_test command injection
CVE-2026-15480 8.8 HIGH Trendnet TEW-635BRM Web Service rc start_httpd stack-based overflow
CVE-2026-15487 6.3 MEDIUM TRENDnet TEW-821DAP Firmware Update system_ntp sub_41FBD0 os command injection
CVE-2026-15485 6.3 MEDIUM TRENDnet TEW-821DAP DNS Lookup tools_nslookup sub_43F2C4 os command injection

IV. Related Vulnerabilities

Same product: TEW-821DAP
Same vendor: TRENDnet
Same weakness: CWE-78

V. Comments for CVE-2026-15486

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