How serious is CVE-2026-3661?

This vulnerability has a CVSS score of 5.1 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3661?

Yes, proof-of-concept exploit code for CVE-2026-3661 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3661?

CVE-2026-3661 affects wavlink wl-nu516u1 firmware. Check the full CVE details for specific version information.

How do I fix CVE-2026-3661?

To remediate CVE-2026-3661, check for security patches from wavlink. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3661

Medium

|5.1

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can remotely execute arbitrary commands on the Wavlink WL-NU516U1 device due to a flaw in its firmware that allows them to manipulate a specific function. This vulnerability requires no special access, making it relatively easy for an attacker to exploit if they know how.

Technical Description

A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$690($500-$1K)

Vendor Response

Grade APatched in 3 days

Quick Information

Published

Mar 7, 2026

about 1 month ago

Last Modified

Mar 10, 2026

28 days ago

Vendor

wavlink

Product

wl-nu516u1 firmware

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This vulnerability allows an attacker to execute cross-site scripting (XSS) attacks remotely by manipulating the Hostname argument in the device's firmware. To exploit this, the attacker needs to send a specially crafted request to the affected device, which can lead to unauthorized actions or data theft from users interacting with the device.

CVE-2026-3715High

An attacker can remotely exploit a vulnerability in the Wavlink WL-WN579X3-C firmware to execute arbitrary code on the device by manipulating a specific setting, which could lead to full control over the device. To protect against this risk, users should upgrade to the latest firmware version as soon as possible.

CVE-2026-3662Medium

An attacker can remotely execute commands on the Wavlink WL-NU516U1 device by manipulating a specific setting in its firmware. This vulnerability requires no special access, making it a significant risk for anyone using this device.

CVE-2026-2615High

An attacker can remotely execute malicious commands on the Wavlink WL-NU516U1 device by exploiting a flaw in its firewall settings. This vulnerability can be triggered by manipulating a specific input, and it affects devices with firmware versions up to December 8, 2025.

CVE-2026-2565Medium

This vulnerability allows an attacker to remotely crash the Wavlink WL-NU516U1 device or potentially take control of it by exploiting a flaw in how the device handles time zone settings. Although the attack is complex and difficult to execute, public exploit code is available, making it a real threat to unpatched devices.