---
id: CVE-2017-6884
title: >-
  A command injection vulnerability was discovered on the Zyxel EMG2926 home
  router with firmware V1.00(AAQT.4)b8
summary: >-
  A command injection vulnerability was discovered on the Zyxel EMG2926 home
  router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the
  diagnostic tools, specifically the nslookup function. A malicious user may
  exploit numer…
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-78
  - CWE-78
vendor: zyxel
product: emg2926_firmware
affected:
  - emg2926_firmware = v1.00(aaqt.4)b8
published: '2017-04-06'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2017-6884'
references:
  - url: 'https://www.exploit-db.com/exploits/41782/'
    label: cve@mitre.org
  - url: 'https://www.exploit-db.com/exploits/41782/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6884
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.34367
epssPercentile: 0.9838
kev: true
kevDateAdded: '2023-09-18'
kevDueDate: '2023-10-09'
kevRansomware: true
exploited: true
exploitAvailable: true
ingestedAt: '2026-08-04T05:36:12.037Z'
exploits:
  exploitdb: true
  checkedAt: '2026-09-21T15:23:36.495Z'
---

## Overview

A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.

## Affected

- `emg2926_firmware = v1.00(aaqt.4)b8`

## Remediation

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