---
id: CVE-2021-44620
title: >-
  A Command Injection vulnerability exits in TOTOLINK A3100R
  <=V4.1.2cu.5050_B20200504 in adm/ntm.asp via the hosTime parameters.
summary: >-
  A Command Injection vulnerability exits in TOTOLINK A3100R
  <=V4.1.2cu.5050_B20200504 in adm/ntm.asp via the hosTime parameters.
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-77
vendor: totolink
product: a3100r_firmware
affected:
  - a3100r_firmware <= 4.1.2cu.5050_b20200504
published: '2022-03-11'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-44620'
references:
  - url: >-
      https://drive.google.com/file/d/1_9ru2GRZ13T1KQKXPq2E14-opgf9ih45/view?usp=sharing
    label: cve@mitre.org
  - url: >-
      https://www.totolink.net/home/menu/newstpl/menu_newstpl/products/id/170.html
    label: nvd@nist.gov
  - url: 'http://a3100r.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://totolink.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://drive.google.com/file/d/1_9ru2GRZ13T1KQKXPq2E14-opgf9ih45/view?usp=sharing
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0135
epssPercentile: 0.70274
ingestedAt: '2026-07-06T02:09:23.436Z'
---

## Overview

A Command Injection vulnerability exits in TOTOLINK A3100R <=V4.1.2cu.5050_B20200504 in adm/ntm.asp via the hosTime parameters.

## Affected

- `a3100r_firmware <= 4.1.2cu.5050_b20200504`

## Remediation

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