CVE-2026-4166

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 10.5% of scored records. A rank, not a probability.

NVD base score

2.0 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-15 05:32Z5 MO AGO

Last updated

2026-03-17 13:46Z5 MO AGO

Reserved

2026-03-14

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.2

Document digest

d90cc651f689251b714115a57aa2486f7038b16342a9a7e16c51b9d35e1f678c

• vuldb.comVDB-351073 | Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scriptinghttps://vuldb.com/?id.351073vdb-entrytechnical-description
• vuldb.comVDB-351073 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/?ctiid.351073signaturepermissions-required
• vuldb.comSubmit #769652 | Wavlink WL-NU516U1 V240425 Cross Site Scriptinghttps://vuldb.com/?submit.769652third-party-advisory
• vuldb.comSubmit #769653 | Wavlink WL-NU516U1 V240425 Cross Site Scripting (Duplicate)https://vuldb.com/?submit.769653third-party-advisory
• github.comhttps://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_14/README.mdrelated
• github.comhttps://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_15/README.mdexploit