CVE-2026-2565

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.

CVSS v3 6.6 MEDIUM
CVSS v2.0 6.8 MEDIUM

6.6^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.7 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.2 / Impact : 10.0

Access Vector NETWORK

Access Complexity HIGH

Authentication MULTIPLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/time_zone.md	Exploit Third Party Advisory
https://vuldb.com/?ctiid.346172	Permissions Required VDB Entry
https://vuldb.com/?id.346172	Third Party Advisory VDB Entry
https://vuldb.com/?submit.751133	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wavlink:wl-nu516u1:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-16 17:18

Updated : 2026-02-18 19:42

NVD link : CVE-2026-2565

Mitre link : CVE-2026-2565

CVE.ORG link : CVE-2026-2565

JSON object : View

Products Affected

wavlink

wl-nu516u1_firmware
wl-nu516u1

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-121

Stack-based Buffer Overflow

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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."}, {"lang": "es", "value": "Se ha identificado una debilidad en Wavlink WL-NU516U1 20251208. Afectada por este problema es la funci\u00f3n sub_40785C del archivo /cgi-bin/adm.cgi. Esta manipulaci\u00f3n del argumento time_zone causa desbordamiento de b\u00fafer basado en pila. El ataque puede ser iniciado remotamente. El ataque se considera que tiene alta complejidad. La explotaci\u00f3n se sabe que es dif\u00edcil. El exploit ha sido puesto a disposici\u00f3n del p\u00fablico y podr\u00eda ser utilizado para ataques. El proveedor fue contactado tempranamente sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."}], "lastModified": "2026-02-18T19:42:27.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "422DDC2F-7D66-4EA7-BD8A-FE781A94898D", "versionEndIncluding": "2025-12-08"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:wavlink:wl-nu516u1:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "C697E865-5984-4974-8A11-43CC6940ABFA"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cna@vuldb.com"}