Wavlink WL-NU516U1 240425 /cgi-bin/login.cgi sub_404F68 homepage/hostname cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.2$0-$5k0.15

Summaryinfo

A vulnerability identified as problematic has been detected in Wavlink WL-NU516U1 240425. This affects the function sub_404F68 of the file /cgi-bin/login.cgi. This manipulation of the argument homepage/hostname causes cross site scripting. This vulnerability appears as CVE-2026-4166. The attack may be initiated remotely. In addition, an exploit is available. The vendor was contacted early about this disclosure.

Detailsinfo

A vulnerability classified as problematic was found in Wavlink WL-NU516U1 240425. Affected by this vulnerability is the function sub_404F68 of the file /cgi-bin/login.cgi. The manipulation of the argument homepage/hostname with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-4166. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-12208). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/14/2026 Advisory disclosed
03/14/2026 +0 days VulDB entry created
03/15/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2026-4166 (🔒)
GCVE (CVE): GCVE-0-2026-4166
GCVE (VulDB): GCVE-100-351073
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/14/2026 13:35
Updated: 03/15/2026 09:47
Changes: 03/14/2026 13:35 (57), 03/15/2026 09:47 (1)
Complete: 🔍
Submitter: LtzHust2
Cache ID: 216:3A0:103

Submitinfo

Accepted

  • Submit #769652: Wavlink WL-NU516U1 V240425 Cross Site Scripting (by LtzHust2)

Duplicate

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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