OS Command Injection in Wavlink NU516U1 Router Affects Remote Security
CVE-2026-8191

5.3MEDIUM

Key Information:

Vendor

Wavlink

Status
Nu516u1
Vendor
CVE Published:
9 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8191?

A significant OS command injection vulnerability has been discovered in the Wavlink NU516U1 router's administration interface. The vulnerability resides in the 'wifi_region' function within the '/cgi-bin/adm.cgi' script. Attackers can manipulate the parameters 'skiplist1' and 'skiplist2' to inject malicious commands with the potential for remote exploitation. This type of vulnerability poses a serious risk as it allows unauthorized execution of system commands on the router. The vendor has been informed about the issue prior to public disclosure, and potential exploits are already available.

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-2026-8191 - Proof of Concept

References

https://vuldb.com/vuln/362343
vdb-entrytechnical-description
https://vuldb.com/vuln/362343/cti
signaturepermissions-required
https://vuldb.com/submit/800730
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
.