TI-2026-03117 Aliases CVE-2026-3613 GHSA-2fhq-mmhr-8hcv

Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow

HIGH 72CWE-119Published 2026-03-06 · Updated 2026-03-09

Key facts

Attack vector: Network
Privileges required: High
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 vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the file /cgi-bin/login.cgi. Such manipulation of the argument ipaddr leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00806 57th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
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	WL-NU516U1	V240425	—	No fix listed	CNA

WL-NU516U1 VendorWavlink Affected V240425 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:wavlink:wl-nu516u1_firmware:m16u1_v240425:::::::*	m16u1_v240425	Vulnerable	Wavlink
cpe:2.3:h:wavlink:wl-nu516u1:-:::::::*	not specified by NVD	Running on	Wavlink

cpe:2.3:o:wavlink:wl-nu516u1_firmware:m16u1_v240425:*:*:*:*:*:*:* Versions m16u1_v240425 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-2026-3613
2026-10-03 Alias added: GHSA-2fhq-mmhr-8hcv

References

Exploit 1

https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/ipaddr_Stack%20Buffer%20Overflow.md

TI-2026-03195 Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write CVSS 4.0CRITICAL 9.3
TI-2026-04241 Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow CVSS 4.0HIGH 8.7
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