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CVE-2026-3703— Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write

CVSS 9.8 · Critical EPSS 0.28% · P52
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I. Basic Information for CVE-2026-3703

Vulnerability Information
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Vulnerability Title
Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
Wavlink NU516U1 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wavlink NU516U1是中国睿因（Wavlink）公司的一款无线打印服务器。 Wavlink NU516U1 251208版本存在缓冲区错误漏洞，该漏洞源于对文件/cgi-bin/login.cgi中函数sub_401A10的参数ipaddr的错误操作，可能导致越界写入。
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)

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Affected Products

VendorProductAffected VersionsCPESubscribe
WavlinkNU516U1 251208 -

II. Public POCs for CVE-2026-3703

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III. Intelligence Information for CVE-2026-3703

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Same Patch Batch · Wavlink · 2026-03-08 · 4 CVEs total

CVE-2026-37158.8 HIGHWavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow
CVE-2026-37044.7 MEDIUMWavlink NU516U1 Incomplete Fix CVE-2025-10959 firewall.cgi sub_405B2C command injection
CVE-2026-37162.4 LOWWavlink WL-WN579X3-C adm.cgi sub_401AD4 cross site scripting

IV. Related Vulnerabilities

Same product: NU516U1
Same vendor: Wavlink
Same weakness: CWE-787

V. Comments for CVE-2026-3703

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