CVE-2026-3703

A flaw has been found in Wavlink NU516U1 251208. This affects the function sub_401A10 of the file /cgi-bin/login.cgi. Executing a manipulation of the argument ipaddr can lead to out-of-bounds write. The attack may be performed from remote. The exploit has been published and may be used. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

CVSS v3 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.bin	Broken Link
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.md	Exploit Vendor Advisory
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.md#exp-exploit--poc	Exploit Vendor Advisory
https://vuldb.com/?ctiid.349649	Permissions Required VDB Entry
https://vuldb.com/?id.349649	Third Party Advisory VDB Entry
https://vuldb.com/?submit.759226	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:wavlink:wl-nu516u1_firmware:251208:*:*:*:*:*:*:*

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

History

No history.

Information

Published : 2026-03-08 05:16

Updated : 2026-03-10 18:55

NVD link : CVE-2026-3703

Mitre link : CVE-2026-3703

CVE.ORG link : CVE-2026-3703

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-787

Out-of-bounds Write

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Se contact\u00f3 al proveedor con antelaci\u00f3n, respondi\u00f3 de manera muy profesional y r\u00e1pidamente lanz\u00f3 una versi\u00f3n corregida del producto afectado."}], "lastModified": "2026-03-10T18:55:10.750", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:wavlink:wl-nu516u1_firmware:251208:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BAA85ED2-474A-40C1-A0B7-10F9B78FCCB9"}], "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"}