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CVE-2026-120231— WAVLINK WN553X1-B OpenVPN CLI ioos sub_416568 os command injection

Quick assessment

Affected

WAVLINK WN553X1-B

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.

经确认，WAVLINK WN553X1-B 固件版本 V260403_2.0.0 存在一处安全漏洞。受影响组件为 OpenVPN CLI 处理器，具体位于文件中的函数。该漏洞源于对参数的操纵，可导致操作系统命令注入攻击。攻击者可远程触发此漏洞。目前该利用方式已公开披露，可能被恶意利用。厂商已在漏洞披露早期阶段收到相关通知。

CVSS 9.9 · Critical Updated Nov 01, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

WAVLINK WN553X1-B OpenVPN CLI ioos sub_416568 os command injection

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

OS命令中使用的特殊元素转义处理不恰当(OS命令注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
WAVLINK	WN553X1-B	V260403_2.0.0	`cpe:2.3:a:wavlink:wn553x1-b::::::::`

II. Public POCs for CVE-2026-120231

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-120231

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Other References for CVE-2026-120231 (1)

CVE-2026-120231 | WAVLINK WN553X1-B V260403_2.0.0 OpenVPN CLI /bin/ioos sub_416568 file_id os command injection vdb-entry technical-description

Other References for CVE-2026-120231 (4)

https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK%20WN553X1-B%20Router/WAVLINK_WN553X1-B_openvpn_cli_command_injection.md exploit
https://vuldb.com/cve/CVE-2026-120231 third-party-advisory
https://vuldb.com/vuln/429590/cti signature permissions-required
https://vuldb.com/submit/919247 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120231

Same Patch Batch · WAVLINK · 2026-11-01 · 9 CVEs total

CVE-2026-120198	10.0 CRITICAL	WAVLINK WL-WN530BE1-A protocol.csp con_check_read_finish command injection
CVE-2026-120195	10.0 CRITICAL	WAVLINK WL-WN579A3-A Initial Setup Wizard adm.cgi set_wzdgwMesh os command injection
CVE-2026-120230	9.9 CRITICAL	WAVLINK WN701AE ioos Web Backend del_vlan_group os command injection
CVE-2026-120228	9.9 CRITICAL	WAVLINK WN553X1-B ioos Service sub_416D88 os command injection
CVE-2026-120227	9.9 CRITICAL	WAVLINK WN701AE ioos Web Backend static_route_setting.sh del_staticrule os command injecti
CVE-2026-120197	9.9 CRITICAL	WAVLINK WL-WN530HG4B wapi.cgi port_forward os command injection
CVE-2026-120196	9.9 CRITICAL	WAVLINK WN579X3-D wapi.cgi port_forward os command injection
CVE-2026-120229	9.1 CRITICAL	WAVLINK WN553X1-B ioos sub_416B50 os command injection

IV. Related Vulnerabilities

Same product: WN553X1-B

Same vendor: WAVLINK

Same weakness: CWE-78