CVE-2026-2566CWE-119CWE-121

Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflow

High · published February 16, 2026

CVSS v4.0
8.6
EPSS
1%
Percentile
62.1
In the wild
Unconfirmed
What it is

A security vulnerability has been detected in Wavlink WL-NU516U1 up to 130/260. This affects the function sub_406194 of the file /cgi-bin/adm.cgi. Such manipulation of the argument firmware_url leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
8.6 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
EPSS
0.00988 · 62.1th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-02-16T17:02Z
EPSS history
Timeline
  • 16 FEB 17:02Z
    Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflow
    cvelistv5