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CVE-2026-4166

Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scripting

LOW

3.5

CVSS Score

Published: March 15, 2026 at 05:32 AM UTC

Updated: June 17, 2026 at 10:56 AM UTC

2 products affected across 1 vendorWl NU516U1 FirmwareWL-NU516U1

Using WL-NU516U1 by Wavlink?

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Severity

LOW3.5

Exploit prediction

EPSS 0.2%

SSVC

PoC

Description

A vulnerability was found in Wavlink WL-NU516U1 240425. The impacted element is the function sub_404F68 of the file /cgi-bin/login.cgi. The manipulation of the argument homepage/hostname results in cross site scripting. The attack can be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Wl NU516U1 Firmware · Wavlink

95%

All versions

WL-NU516U1 · Wavlink

60%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical Description

Source: cverecord

https://vuldb.com/?id.351073

SignaturePermissions Required

Source: cverecord

https://vuldb.com/?ctiid.351073

Third Party Advisory

Source: cverecord

https://vuldb.com/?submit.769652

Third Party Advisory

Source: cverecord

https://vuldb.com/?submit.769653

Related

Source: cverecord

https://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_14/README.md

Exploit

Source: cverecord

https://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_15/README.md

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.5LOWVulDB

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-79CWE-94

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