CVE-2026-2566

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.

CVSS v3 7.2 HIGH
CVSS v2.0 8.3 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

8.3^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:M/C:C/I:C/A:C

Exploitability : 6.4 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication MULTIPLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/firmware_url.md
https://vuldb.com/?ctiid.346173
https://vuldb.com/?id.346173
https://vuldb.com/?submit.751908

Configurations

No configuration.

History

18 Feb 2026, 17:52

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de seguridad ha sido detectada en Wavlink WL-NU516U1 hasta 130/260. Esto afecta la función sub_406194 del archivo /cgi-bin/adm.cgi. Dicha manipulación del argumento firmware_url conduce a un desbordamiento de búfer basado en pila. El ataque puede ser lanzado de forma remota. El exploit ha sido divulgado públicamente y puede ser utilizado. El proveedor fue contactado tempranamente sobre esta divulgación, pero no respondió de ninguna manera.

16 Feb 2026, 18:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-16 18:19

Updated : 2026-02-18 17:52

NVD link : CVE-2026-2566

Mitre link : CVE-2026-2566

CVE.ORG link : CVE-2026-2566

JSON object : View

Products Affected

No product.

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow

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