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CVE-2026-2566

Published: Feb 16, 2026

Modified: Feb 23, 2026

PUBLISHED

CVSS v3.1

7.2

HIGH

Description

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.

Vendor	Product	Versions
Wavlink	WL-NU516U1	affected `130` affected `260`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

VDB-346173 | Wavlink WL-NU516U1 adm.cgi sub_406194 stack-based overflow

vdb-entry

technical-description

VDB-346173 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #751908 | Wavlink NU516U1 V251208 Stack-based Buffer Overflow

third-party-advisory

https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/firmware_url.md

exploit

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