OS Command Injection Vulnerability in Wavlink NU516U1 Router
CVE-2026-8188

5.3MEDIUM

Key Information:

Vendor

Wavlink

Status
Nu516u1
Vendor
CVE Published:
9 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8188?

A vulnerability has been identified in the Wavlink NU516U1 router, specifically in the change_wifi_password function located in the /cgi-bin/adm.cgi file. This weakness allows an attacker to manipulate specific arguments, such as wl_channel, wl_Pass, and EncrypType, to perform OS command injection. The manipulation can be initiated remotely, making it easily exploitable. The vulnerability has been publicly disclosed, and early contact was made with the vendor regarding this security issue.

Affected Version(s)

NU516U1 M16U1_V240425

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-2026-8188 - Proof of Concept

References

https://vuldb.com/vuln/362340
vdb-entrytechnical-description
https://vuldb.com/vuln/362340/cti
signaturepermissions-required
https://vuldb.com/submit/800727
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

Ziyue Xie (VulDB User)
VulDB CNA Team
.