CVE-2026-2566

HIGH
2026-02-16 [email protected]
7.2
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Feb 16, 2026 - 18:19 nvd
HIGH 7.2

Tags

Buffer Overflow Stack Overflow

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.

Analysis

Stack buffer overflow in Wavlink WL-NU516U1 firmware up to version 130/260 allows authenticated remote attackers to achieve code execution via a malformed firmware_url parameter to /cgi-bin/adm.cgi. Public exploit code exists for this vulnerability and the vendor has not provided a patch despite early notification. …

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Remediation

Within 24 hours: Inventory all Wavlink WL-NU516U1 devices in your environment and isolate affected units from critical network segments. Within 7 days: Implement network segmentation to restrict administrative access to these devices and disable remote management features where possible. …

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Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +36
POC: 0

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CVE-2026-2566 vulnerability details – vuln.today
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