CVE-2026-6559 MEDIUM

CVE-2026-6559: Wavlink WL-WN579A3 login.cgi sub_401F80 cross site scripting

Vendor Wavlink

Product WL-WN579A3

Weakness CWE-79 · XSS

Published April 19, 2026

Last update April 20, 2026

View on NVD All CVEs

CVSS base score

5.3/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction —

Confidentiality —

Integrity —

CVSS vector

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

What the vulnerability does

01Description

A weakness has been identified in Wavlink WL-WN579A3 220323. This affects the function sub_401F80 of the file /cgi-bin/login.cgi. This manipulation of the argument Hostname causes cross site scripting. Remote exploitation of the attack is possible. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Key dates

02Disclosure timeline

April 19, 2026 CVE published

April 20, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-6559 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html

Related vulnerabilities

04Related CVE

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