VDB-349650 · CVE-2026-3704 · EUVD-2026-10208

Wavlink NU516U1 251208 Incomplete Fix CVE-2025-10959 /cgi-bin/firewall.cgi sub_405B2C command injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4	$0-$5k	0.26

Summaryinfo

A vulnerability classified as critical was found in Wavlink NU516U1 251208. This issue affects the function sub_405B2C of the file /cgi-bin/firewall.cgi of the component Incomplete Fix CVE-2025-10959. The manipulation results in command injection. This vulnerability is known as CVE-2026-3704. It is possible to launch the attack remotely. Furthermore, an exploit is available. Upgrading the affected component is advised. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Detailsinfo

A vulnerability classified as critical has been found in Wavlink NU516U1 251208. Affected is the function sub_405B2C of the file /cgi-bin/firewall.cgi of the component Incomplete Fix CVE-2025-10959. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-3704. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation requires an enhanced level of successful authentication. Technical details and a public exploit are known. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at dl.wavlink.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-10208). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Wavlink

Name

NU516U1

Version

251208

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.7
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔒

CNA Base Score: 4.7
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: dl.wavlink.com

Timelineinfo

03/07/2026 Advisory disclosed
03/07/2026 +0 days VulDB entry created
03/12/2026 +5 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-3704 (🔒)
GCVE (CVE): GCVE-0-2026-3704
GCVE (VulDB): GCVE-100-349650
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/07/2026 10:01
Updated: 03/12/2026 14:39
Changes: 03/07/2026 10:01 (59), 03/08/2026 16:21 (30), 03/09/2026 01:03 (1), 03/12/2026 14:39 (12)
Complete: 🔍
Submitter: haimianbaobao
Cache ID: 216:170:103

Submitinfo

Accepted

Submit #759233: Wavlink NU516U1 V251208 Command Injection (by haimianbaobao)

If you want to get best quality of vulnerability data, you may have to visit VulDB.