Command Injection Vulnerability in Wavlink WL-NU516U1 Product
CVE-2026-3612

8.6HIGH

Key Information:

Vendor

Wavlink

Status
Wl-nu516u1
Vendor
CVE Published:
6 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3612?

A command injection vulnerability exists in the Wavlink WL-NU516U1 V240425 product, specifically in the OTA Online Upgrade function found in the /cgi-bin/adm.cgi file at sub_405AF4. The issue arises from improper handling of user-supplied input, allowing attackers to manipulate the argument firmware_url. This vulnerability can be exploited remotely, enabling potential unauthorized command execution on the affected system. The exploit for this vulnerability has been publicly disclosed, and users are advised to assess their exposure and implement the necessary security measures.

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Affected Version(s)

WL-NU516U1 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-2026-3612 - Proof of Concept

References

https://vuldb.com/?id.349220
vdb-entrytechnical-description
https://vuldb.com/?ctiid.349220
signaturepermissions-required
https://vuldb.com/?submit.754668
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
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

haimianbaobao (VulDB User)
VulDB
JSON
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