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CVE-2026-3703

Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write

Published: Mar 8, 2026Updated: Mar 10, 2026 Sources: CVE List NVDCWE-119
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.8%
Top 47.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-119CWE-787

Affected Products

wl-nu516u1 firmwarewavlinkNetworking Infrastructure
NU516U1WavlinkNetworking Infrastructure
wavlinkcommercialCNNetworking Infrastructureaka wavlink

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.bin
dl.wavlink.com
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.md
github.com
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.md#exp-exploit--poc
github.com
and 3 more references View all →

Timeline

Published
Mar 8, 2026
Last Updated
Mar 10, 2026

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