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CVE-2026-120281— WAVLINK WN536AX6-A OpenVPN protocol.csp strcpy stack-based overflow

Quick assessment

Affected

WAVLINK WN536AX6-A

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 WAVLINK WN536AX6-A（固件版本 V260507）中发现一个漏洞。该漏洞影响 OpenVPN Handler 组件中文件内的函数。攻击者可通过操纵参数引发基于栈的缓冲区溢出。该攻击可远程发起，且利用代码已被公开，可能被实际利用。厂商已在披露初期收到相关通报。

CVSS 10.0 · Critical Updated Nov 02, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

WAVLINK WN536AX6-A OpenVPN protocol.csp strcpy stack-based overflow

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

栈缓冲区溢出

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
WAVLINK	WN536AX6-A	V260507	`cpe:2.3:a:wavlink:wn536ax6-a::::::::`

II. Public POCs for CVE-2026-120281

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120281

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Other References for CVE-2026-120281 (1)

CVE-2026-120281 | WAVLINK WN536AX6-A V260507 OpenVPN /protocol.csp strcpy openvpn_ip stack-based overflow vdb-entry technical-description

Other References for CVE-2026-120281 (4)

https://github.com/F-yyjy/cve/blob/main/WN536AX6-A_openvpn_ip.md exploit
https://vuldb.com/cve/CVE-2026-120281 third-party-advisory
https://vuldb.com/vuln/429625/cti signature permissions-required
https://vuldb.com/submit/919790 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120281

Same Patch Batch · WAVLINK · 2026-11-02 · 4 CVEs total

CVE-2026-120280	10.0 CRITICAL	WAVLINK WN536AX6-A WireGuard protocol.csp wireguard_cli_group handler os command injection
CVE-2026-120279	10.0 CRITICAL	WAVLINK WN536AX6-A openvpn_cli protocol.csp os command injection
CVE-2026-120282	9.9 CRITICAL	WAVLINK WN536AX6-A protocol.csp host_black os command injection

IV. Related Vulnerabilities

Same product: WN536AX6-A

Same vendor: WAVLINK

Same weakness: CWE-121