TI-2026-03195 Aliases CVE-2026-3703 GHSA-6rfc-r3c7-7f5j

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

HIGH 81CWE-119Published 2026-03-08 · Updated 2026-03-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00929 60th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD and the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Wavlink	NU516U1	251208	—	No fix listed	CNA

NU516U1 VendorWavlink Affected 251208 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:wavlink:wl-nu516u1_firmware:251208:::::::*	251208	Vulnerable	Wavlink
cpe:2.3:h:wavlink:wl-nu516u1:-:::::::*	not specified by NVD	Running on	Wavlink

cpe:2.3:o:wavlink:wl-nu516u1_firmware:251208:*:*:*:*:*:*:* Versions 251208 Vulnerable ·Wavlink
cpe:2.3:h:wavlink:wl-nu516u1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Wavlink

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-3703
2026-10-03 Alias added: GHSA-6rfc-r3c7-7f5j

References

Exploit 2

Patch 1

https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.bin

TI-2026-04241 Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow CVSS 4.0HIGH 8.7
TI-2026-03117 Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow CVSS 4.0HIGH 8.6
TI-2026-03116 Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection CVSS 4.0HIGH 8.6
TI-2026-02231 Wavlink WL-NU516U1 firewall.cgi singlePortForwardDelete command injection CVSS 4.0HIGH 8.6
TI-2026-02193 Wavlink WL-NU516U1 nas.cgi sub_401218 stack-based overflow CVSS 4.0HIGH 8.6
TI-2026-02191 Wavlink WL-NU516U1 adm.cgi sub_40785C stack-based overflow CVSS 4.0HIGH 7.5

See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences