---
id: CVE-2026-5609
title: A flaw has been found in Tenda i12 1.0.0.11(3862)
summary: >-
  A flaw has been found in Tenda i12 1.0.0.11(3862). Affected by this
  vulnerability is the function formwrlSSIDset of the file /goform/wifiSSIDset
  of the component Parameter Handler. This manipulation of the argument
  index/wl_radio causes …
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: i12_firmware
affected:
  - i12_firmware = 1.0.0.11(3862)
published: '2026-04-06'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5609'
references:
  - url: 'https://github.com/Litengzheng/vuldb_new/blob/main/i12/vul_107/README.md'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/785337'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355400'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355400/cti'
    label: cna@vuldb.com
  - url: 'https://www.tenda.com.cn/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.01009
epssPercentile: 0.61541
ingestedAt: '2026-07-24T09:23:51.710Z'
---

## Overview

A flaw has been found in Tenda i12 1.0.0.11(3862). Affected by this vulnerability is the function formwrlSSIDset of the file /goform/wifiSSIDset of the component Parameter Handler. This manipulation of the argument index/wl_radio causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used.

## Affected

- `i12_firmware = 1.0.0.11(3862)`

## Remediation

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