Vulnerability · Published Mar 15, 2026 · Assigned by VulDB
CVE-2026-4166Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scripting
Low 3.5
In plain English
A low-severity cross-site scripting in WL-NU516U1 from Wavlink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).
Severity (CVSS 3.1)3.5Low
Exploit odds (30 days)0.2%top 88.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wavlink | WL-NU516U1 | 240425 |
Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
References
- VDB-351073 | Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scripting vdb-entry, technical-description
- VDB-351073 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- Submit #769652 | Wavlink WL-NU516U1 V240425 Cross Site Scripting third-party-advisory
- Submit #769653 | Wavlink WL-NU516U1 V240425 Cross Site Scripting (Duplicate) third-party-advisory
- https://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_14/README.md related
- https://github.com/Litengzheng/vul_db/blob/main/WL-NU516U1/vul_15/README.md exploit