Buffer overflow in Wavlink Nu516u1
CVE-2026-3703
A flaw has been found in Wavlink NU516U1 251208. This affects the function sub_401A10 of the file /cgi-bin/login.cgi. Executing a manipulation of the argument ipaddr can lead to out-of-bounds write. The attack may be performed from remote…
Vulnerability class: Buffer Overflow
EPSS: 0.008 (53.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Wavlink Nu516u1 — versions 251208
- Wavlink Wl-nu516u1
- Wavlink Wl-nu516u1_firmware — versions 251208
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
- cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (related, Exploit, Vendor Advisory)
- cna@vuldb.com (Exploit, exploit, Vendor Advisory)
- cna@vuldb.com (patch, Broken Link)
Frequently asked questions
- What is CVE-2026-3703?
- CVE-2026-3703 is a critical-severity vulnerability in Wavlink Nu516u1, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2026-03-08.
- How severe is CVE-2026-3703?
- Critical severity. CVSS v3 base score is 9.8 out of 10.