CVE-2026-6559

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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-26)

CWEs

CWE-79, CWE-94

Published

2026-04-19

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

References

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

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