---
id: CVE-2026-120239
title: WAVLINK WN553X1-B WireGuard CLI ioos sub_419DA8 os command injection
summary: >-
  A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. This
  vulnerability affects the function sub_419DA8 of the file /bin/ioos of the
  component WireGuard CLI Handler. Performing a manipulation of the argument
  file_id results in o…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R'
cvssSource: cna
cwe:
  - CWE-78
  - CWE-77
vendor: WAVLINK
product: WN553X1-B
affected:
  - WN553X1-B V260403_2.0.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T17:16:01.257583Z'
exploitAvailable: true
published: '2026-11-01'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T17:41:18.797Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120239'
references:
  - url: 'https://vuldb.com/vuln/429598'
    label: >-
      VDB-429598 | WAVLINK WN553X1-B WireGuard CLI ioos sub_419DA8 os command
      injection
  - url: 'https://vuldb.com/vuln/429598/cti'
    label: 'VDB-429598 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-120239'
    label: CVE-2026-120239 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/919250'
    label: 'Submit #919250 | Wavlink Router Firmware V260403_2.0.0 Command Injection'
  - url: >-
      https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_wireguard_cli_command_injection.md
tags:
  - cve.org
  - exploit-available
epss: 0.01687
epssPercentile: 0.77097
ingestedAt: '2026-11-05T19:30:42.742Z'
---

## Overview

A vulnerability was found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_419DA8 of the file /bin/ioos of the component WireGuard CLI Handler. Performing a manipulation of the argument file_id results in os command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

## Affected

- `WN553X1-B V260403_2.0.0`

## Remediation

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