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CVE-2026-74843— Wavlink WN531P3/WN535M1 Export Pingortrace CGI export_pingortrace.cgi strcpy stack-based overflow

CVSS 10.0 · Critical EPSS 0.97% · P59

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProductVersion RangeStatus
WavlinkWN531P3V250922affected
WavlinkWN535M1V250922affected
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I. Basic Information for CVE-2026-74843

Vulnerability Information
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Vulnerability Title
Wavlink WN531P3/WN535M1 Export Pingortrace CGI export_pingortrace.cgi strcpy stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Wavlink WN531P3 and WN535M1 V250922. Affected by this vulnerability is the function strcpy of the file /etc/lighttpd/www/cgi-bin/export_pingortrace.cgi of the component Export Pingortrace CGI. Executing a manipulation of the argument HTTP_COOKIE can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 WN531P3 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAVLINK WN531P3是中国WAVLINK公司的一款无线网络连接设备。 WAVLINK WN531P3 V250922版本和Wavlink WN535M1 V250922版本存在缓冲区错误漏洞，该漏洞源于Export Pingortrace CGI组件中strcpy函数对HTTP_COOKIE参数处理不当，导致栈缓冲区溢出，可能允许远程攻击者利用该漏洞。
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

VendorProductAffected VersionsCPESubscribe
WavlinkWN531P3 V250922 cpe:2.3:a:wavlink:wn531p3:*:*:*:*:*:*:*:*
WavlinkWN535M1 V250922 cpe:2.3:a:wavlink:wn535m1:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-74843

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10994 chars
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III. Intelligence Information for CVE-2026-74843

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Other References for CVE-2026-74843 (1)

IV. Related Vulnerabilities

Same vendor: Wavlink
Same weakness: CWE-121

V. Comments for CVE-2026-74843

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