CVE-2026-74843

CRITICAL 10.0

Wavlink WN531P3/WN535M1 Export Pingortrace CGI export_pingortrace.cgi strcpy stack-based overflow

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	wavlink
Product	wn531p3
Published	Aug 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Wavlink / WN531P3

V250922

Wavlink / WN535M1

V250922

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/391205 vuldb.com: https://vuldb.com/vuln/391205/cti vuldb.com: https://vuldb.com/cve/CVE-2026-74843 vuldb.com: https://vuldb.com/submit/875331 github.com: https://github.com/wcndsb-sketch/WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow/blob/main/CVE-Report-WAVLINK-WN535M1-RCE.pdf

Credits

🔍 world5 (VulDB User) VulDB CNA Team