Command Injection Vulnerability in Wavlink NU516U1 Firewall Product
CVE-2025-10959

5.3MEDIUM

Key Information:

Vendor

Wavlink

Status
Nu516u1
Vendor
CVE Published:
25 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-10959?

A command injection vulnerability has been discovered in the Wavlink NU516U1 firewall, specifically within the sub_401778 function of the firewall.cgi file. The vulnerability arises from improper handling of the dmz_flag argument, which could be exploited by an attacker to execute arbitrary commands on the device remotely. This flaw poses a significant risk, as successful exploitation could allow unauthorized users to manipulate the system. The issue was reported to the vendor, but no response was received, leading to public disclosure. Users of the affected product should take immediate measures to mitigate potential attacks.

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-2025-10959 - Proof of Concept

References

https://vuldb.com/?id.325827
vdb-entrytechnical-description
https://vuldb.com/?ctiid.325827
signaturepermissions-required
https://vuldb.com/?submit.652769
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

panda_0x1 (VulDB User)
JSON
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CVE-2025-10959 : Command Injection Vulnerability in Wavlink NU516U1 Firewall Product