---
id: CVE-2025-14656
title: A weakness has been identified in Tenda AC20 16.03.08.12
summary: >-
  A weakness has been identified in Tenda AC20 16.03.08.12. This affects the
  function httpd of the file /goform/openSchedWifi. Executing a manipulation of
  the argument schedStartTime/schedEndTime can lead to buffer overflow. The
  attack may…
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-120
vendor: tenda
product: ac20_firmware
affected:
  - ac20_firmware = 16.03.08.12
published: '2025-12-14'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T19:10:00.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14656'
references:
  - url: >-
      https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN14/AC20_openSchedWifi.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.336389'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.336389'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.712917'
    label: cna@vuldb.com
  - url: 'https://www.tenda.com.cn/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00736
epssPercentile: 0.52961
ingestedAt: '2026-10-07T19:44:15.670Z'
---

## Overview

A weakness has been identified in Tenda AC20 16.03.08.12. This affects the function httpd of the file /goform/openSchedWifi. Executing a manipulation of the argument schedStartTime/schedEndTime can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

## Affected

- `ac20_firmware = 16.03.08.12`

## Remediation

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