OpenVPN CLI Handler Command Injection Vulnerability in WAVLINK Product
CVE-2026-120231

9.4CRITICAL

Key Information:

Vendor

Wavlink

Status
Wn553x1-b
Vendor
CVE Published:
1 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-120231?

A command injection vulnerability exists in the OpenVPN CLI Handler of WAVLINK's WN553X1-B device. The flaw, located in the function sub_416568 of the '/bin/ioos' file, arises from improper handling of the argument 'file_id'. This vulnerability can be exploited remotely, allowing attackers to execute arbitrary commands on the device. Despite having been publicly disclosed, which raises concerns about the potential for exploitation, the vendor was alerted about this issue in advance.

Affected Version(s)

WN553X1-B V260403_2.0.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-120231 - Proof of Concept

References

https://vuldb.com/vuln/429590
vdb-entrytechnical-description
https://vuldb.com/vuln/429590/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-120231
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

shuyi (VulDB User)
VulDB CNA Team
.