Medium severity · published Apr 19, 2026
CVE-2026-6559
Wavlink WL-WN579A3 login.cgi sub_401F80 cross site scripting
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WL
WL-WN579A3 · Wavlink
220323 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6559
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6559
dl.wavlink.com
https://dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin
github.com
https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_16/README.md
vuldb.com
https://vuldb.com/submit/785303
vuldb.com
https://vuldb.com/vuln/358196
vuldb.com
https://vuldb.com/vuln/358196/cti
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