---
id: CVE-2026-120231
title: WAVLINK WN553X1-B OpenVPN CLI ioos sub_416568 os command injection
summary: >-
  A vulnerability was determined in WAVLINK WN553X1-B V260403_2.0.0. The
  affected element is the function sub_416568 of the file /bin/ioos of the
  component OpenVPN CLI Handler. This manipulation of the argument file_id
  causes os command in…
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: '2026-11-02T17:15:55.784582Z'
exploitAvailable: true
published: '2026-11-01'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T17:42:12.121Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120231'
references:
  - url: 'https://vuldb.com/vuln/429590'
    label: >-
      VDB-429590 | WAVLINK WN553X1-B OpenVPN CLI ioos sub_416568 os command
      injection
  - url: 'https://vuldb.com/vuln/429590/cti'
    label: 'VDB-429590 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-120231'
    label: CVE-2026-120231 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/919247'
    label: 'Submit #919247 | 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_openvpn_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 determined in WAVLINK WN553X1-B V260403_2.0.0. The affected element is the function sub_416568 of the file /bin/ioos of the component OpenVPN CLI Handler. This manipulation of the argument file_id causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. 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.