---
id: CVE-2021-44971
title: >-
  Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0
  Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on
summary: >-
  Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0
  Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an
  attacker can obtain sensitive information, and even combine it with
  authenticate…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-697
vendor: tenda
product: ac15_firmware
affected:
  - ac15_firmware = 15.03.05.20_multi
  - ac5_firmware = 15.03.06.48_multi
published: '2022-01-28'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-44971'
references:
  - url: 'https://github.com/21Gun5/my_cve/blob/main/tenda/bypass_auth.md'
    label: cve@mitre.org
  - url: 'http://ac15v10.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://tenda.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/21Gun5/my_cve/blob/main/tenda/bypass_auth.md'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.021
epssPercentile: 0.80914
ingestedAt: '2026-07-06T02:09:23.195Z'
---

## Overview

Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an attacker can obtain sensitive information, and even combine it with authenticated command injection to implement RCE.

## Affected

- `ac15_firmware = 15.03.05.20_multi`
- `ac5_firmware = 15.03.06.48_multi`

## Remediation

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