---
id: CVE-2025-10838
title: A vulnerability was identified in Tenda AC21 16.03.08.16
summary: >-
  A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element
  is the function sub_45BB10 of the file /goform/WifiExtraSet. The manipulation
  of the argument wpapsk_crypto leads to buffer overflow. It is possible to
  initia…
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: ac21_firmware
affected:
  - ac21_firmware <= 16.03.08.16
published: '2025-09-23'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T20:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-10838'
references:
  - url: >-
      https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC21/Tenda%20AC21%20Buffer%20overflow.md
    label: cna@vuldb.com
  - url: >-
      https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC21/Tenda%20AC21%20Buffer%20overflow.md#poc
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.325200'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.325200'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.657126'
    label: cna@vuldb.com
  - url: 'https://www.tenda.com.cn/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.01033
epssPercentile: 0.62834
ingestedAt: '2026-10-12T14:50:33.976Z'
---

## Overview

A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function sub_45BB10 of the file /goform/WifiExtraSet. The manipulation of the argument wpapsk_crypto leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

## Affected

- `ac21_firmware <= 16.03.08.16`

## Remediation

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