CVE-2026-6559

MEDIUM 4.3

Wavlink WL-WN579A3 login.cgi sub_401F80 cross site scripting

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79 CWE-94
Vendor	wavlink
Product	wl-wn579a3
Published	Apr 19, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Wavlink / WL-WN579A3

220323

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/358196 vuldb.com: https://vuldb.com/vuln/358196/cti vuldb.com: https://vuldb.com/submit/785303 github.com: https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_16/README.md dl.wavlink.com: https://dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin

Credits

🔍 LtzHust2 (VulDB User) VulDB CNA Team