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: 0.003 (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/E:P/RL:O/RC:C.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-3703?
CVE-2026-3703 is a critical-severity vulnerability in Wavlink Nu516u1, classified under Out-of-bounds Write. 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.