---
id: CVE-2026-120281
title: WAVLINK WN536AX6-A OpenVPN protocol.csp strcpy stack-based overflow
summary: >-
  A vulnerability was found in WAVLINK WN536AX6-A V260507. This affects the
  function strcpy of the file /protocol.csp of the component OpenVPN Handler.
  The manipulation of the argument openvpn_ip results in stack-based buffer
  overflow. The…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R'
cvssSource: cna
cwe:
  - CWE-121
  - CWE-119
vendor: WAVLINK
product: WN536AX6-A
affected:
  - WN536AX6-A V260507
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T00:30:18.106Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120281'
references:
  - url: 'https://vuldb.com/vuln/429625'
    label: >-
      VDB-429625 | WAVLINK WN536AX6-A OpenVPN protocol.csp strcpy stack-based
      overflow
  - url: 'https://vuldb.com/vuln/429625/cti'
    label: 'VDB-429625 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-120281'
    label: CVE-2026-120281 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/919790'
    label: 'Submit #919790 | Wavlink WN536AX6 V260507 CWE-121'
  - url: 'https://github.com/F-yyjy/cve/blob/main/WN536AX6-A_openvpn_ip.md'
tags:
  - cve.org
epss: 0.00584
epssPercentile: 0.48013
ingestedAt: '2026-11-05T19:30:42.615Z'
---

## Overview

A vulnerability was found in WAVLINK WN536AX6-A V260507. This affects the function strcpy of the file /protocol.csp of the component OpenVPN Handler. The manipulation of the argument openvpn_ip results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

## Affected

- `WN536AX6-A V260507`

## Remediation

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