CVE-2026-2565CWE-119CWE-121

Wavlink WL-NU516U1 adm.cgi sub_40785C stack-based overflow

High · published February 16, 2026

CVSS v4.0
7.5
EPSS
1%
Percentile
65.5
In the wild
Unconfirmed
What it is

A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
7.5 · HIGH
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
EPSS
0.01105 · 65.5th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-02-16T16:32Z
EPSS history
Timeline
  • 16 FEB 16:32Z
    Wavlink WL-NU516U1 adm.cgi sub_40785C stack-based overflow
    cvelistv5