What is the CVSS score of CVE-2026-2566?

CVE-2026-2566 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Wavlink WL-NU516U1 are affected by CVE-2026-2566?

A high-severity buffer overflow vulnerability affects Wavlink WL-NU516U1 wireless devices up to version 130, potentially allowing attackers to execute arbitrary code and compromise network…

How to fix or mitigate CVE-2026-2566?

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. Within 30 days: Develop a device replacement strategy and begin procurement of alternative wireless solutions from vendors with active security support.

Wavlink WL-NU516U1 CVE-2026-2566

HIGH

Buffer Overflow (CWE-119)

2026-02-16 cna@vuldb.com

Buffer Overflow Stack Overflow

7.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.2 HIGH

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 16, 2026 - 18:19 nvd

HIGH 7.2

DescriptionCVE.org

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.

AnalysisAI

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. The high CVSS score (7.2) reflects the severity of unauthenticated remote code execution risk, though exploitation currently requires high-level privileges.

Technical ContextAI

This vulnerability (CWE-119: Buffer Overflow) affects A security vulnerability has been detected in Wavlink WL-NU516U1. 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.

Affected ProductsAI

Product: A security vulnerability has been detected in Wavlink WL-NU516U1. Versions: up to 130.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.