CVE-2026-6559 Details
Description
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.
A cross-site scripting (XSS) vulnerability has been identified in the Wavlink WL-WN579A3 router, specifically in version 220323. The issue arises in the '/cgi-bin/login.cgi' file, within the 'sub_401F80' function. The vulnerability can be exploited remotely by manipulating the 'Hostname' argument in POST requests to the login page, without requiring authentication. This exploitation involves injecting unfiltered data that is then output to other users as part of the web page.
Users are advised to upgrade to the latest version of the Wavlink WL-WN579A3 router, which includes a fix for this vulnerability. The updated version can be downloaded from the Wavlink firmware repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 19, 2026CISA-ADP
Assessed Apr 20, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin | [email protected] | Broken LinkVendor |
| https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_16/README.md | [email protected] | Broken Link |
| https://vuldb.com/submit/785303 | [email protected] | Technical Description |
| https://vuldb.com/vuln/358196 | [email protected] | AdvisoryRemedy |
| https://vuldb.com/vuln/358196/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Wavlink WL-WN579A3 | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 19, 2026 | New CVE Received | [email protected] |