OS Command Injection Vulnerability in WAVLINK WN553X1-B Router
CVE-2026-120229

9.4CRITICAL

Key Information:

Vendor

Wavlink

Status
Wn553x1-b
Vendor
CVE Published:
1 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-120229?

A vulnerability exists in the WAVLINK WN553X1-B router, specifically affecting version 260403_2.0.0. An issue related to the 'sub_416B50' function in the '/bin/ioos' file allows an attacker to manipulate the 'file_id' argument, leading to operating system command injection. This vulnerability can be exploited remotely, making it a significant risk for network security. The potential exploit has been publicly disclosed, and relevant parties have been notified.

Affected Version(s)

WN553X1-B 260403_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-2026-120229 - Proof of Concept

References

https://vuldb.com/vuln/429588
vdb-entrytechnical-description
https://vuldb.com/vuln/429588/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-120229
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

VulDB CNA Team
.