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CVE-2026-3613— Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow

Quick assessment

Affected
Wavlink WL-NU516U1
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WAVLINK WL-NU516U1是中国睿因（WAVLINK）公司的一款无线打印服务器。 Wavlink WL-NU516U1 V240425版本存在安全漏洞，该漏洞源于对文件/cgi-bin/login.cgi中参数ipaddr的错误操作，可能导致栈缓冲区溢出。

CVSS 7.2 · High EPSS 1.17% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-3613

Vulnerability Information
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Vulnerability Title
Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
WAVLINK WL-NU516U1 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAVLINK WL-NU516U1是中国睿因（WAVLINK）公司的一款无线打印服务器。 Wavlink WL-NU516U1 V240425版本存在安全漏洞，该漏洞源于对文件/cgi-bin/login.cgi中参数ipaddr的错误操作，可能导致栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wavlink WL-NU516U1 V240425 cpe:2.3:o:wavlink:wl-nu516u1_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-3613

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9354 chars
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III. Intelligence Information for CVE-2026-3613

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Vendor Advisories for CVE-2026-3613 (2)

News Coverage for CVE-2026-3613 (1)

IV. Related Vulnerabilities

Same product: WL-NU516U1
Same vendor: Wavlink
Same weakness: CWE-121

V. Comments for CVE-2026-3613

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