---
id: CVE-2026-15486
title: A vulnerability has been found in TRENDnet TEW-821DAP 1.11B03
summary: >-
  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 lea…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-77
  - CWE-78
published: '2026-07-12'
updated: '2026-07-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15486'
references:
  - url: >-
      https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Trendnet/TEW-821DAP_CI4.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-15486'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/842383'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/377793'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/377793/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-07-12T09:20:04.124Z'
epss: 0.01768
epssPercentile: 0.77111
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.