---
id: CVE-2026-90689
title: >-
  A security flaw has been discovered in Tenda W20E
  15.11.0.61068_1546_841_CN_TDC
summary: >-
  A security flaw has been discovered in Tenda W20E
  15.11.0.61068_1546_841_CN_TDC. Impacted is the function
  formDelWebAuthWhiteUser. Performing a manipulation of the argument
  webAuthWhiteUserIndex results in stack-based buffer overflow. Th…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-121
vendor: Tenda
product: W20E
affected:
  - W20E 15.11.0.61068_1546_841_CN_TDC
published: '2026-09-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:56:48.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90689'
references:
  - url: >-
      https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/Tenda/W20E/formDelWebAuthWhiteUser/README.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90689'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/914981'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403222'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403222/cti'
    label: cna@vuldb.com
  - url: 'https://www.tenda.com.cn/'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-14T10:54:39.870335Z'
ingestedAt: '2026-09-14T15:23:07.462Z'
epss: 0.00854
epssPercentile: 0.56478
---

## Overview

A security flaw has been discovered in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. Impacted is the function formDelWebAuthWhiteUser. Performing a manipulation of the argument webAuthWhiteUserIndex results in stack-based buffer overflow. The attack can be initiated remotely.

## Remediation

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