Low severity · published Mar 15, 2026
CVE-2026-4166
Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scripting
3.5
CVSS
0.2%
EPSS
No
On KEV
Description
A vulnerability was found in Wavlink WL-NU516U1 240425. The impacted element is the function sub_404F68 of the file /cgi-bin/login.cgi. The manipulation of the argument homepage/hostname results in cross site scripting. The attack can be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WL
WL-NU516U1 · Wavlink
240425 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4166
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4166
github.com
https://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_14/README.md
github.com
https://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_15/README.md
vuldb.com
https://vuldb.com/?ctiid.351073
vuldb.com
https://vuldb.com/?id.351073
vuldb.com
https://vuldb.com/?submit.769652
vuldb.com
https://vuldb.com/?submit.769653
More from WL-NU516U1
9.8
CVE-2026-18589
Wavlink WL-NU516U1 nas.cgi change_password stack-based overflow
9.8
CVE-2026-18588
Wavlink WL-NU516U1 nas.cgi fgets stack-based overflow
9.8
CVE-2026-3703
Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write
9.8
CVE-2025-9149
Wavlink WL-NU516U1 wireless.cgi sub_4032E4 command injection
8.8
CVE-2026-8230
Wavlink NU516U1 login.cgi sys_login1 os command injection