CVE-2026-74843CWE-119CWE-121

CVE-2026-74843

Critical · published August 17, 2026

CVSS v3.1
10.0
EPSS
1%
Percentile
63.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
10.0 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
EPSS
0.01038 · 63.6th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-08-17T16:18Z
References (5)
https://github.com/wcndsb-sketch/WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow/blob/main/CVE-Report-WAVLINK-WN535M1-RCE.pdf · [email protected]https://vuldb.com/cve/CVE-2026-74843 · [email protected]https://vuldb.com/submit/875331 · [email protected]https://vuldb.com/vuln/391205 · [email protected]https://vuldb.com/vuln/391205/cti · [email protected]
EPSS history
Timeline
  • 17 AUG 11:15Z
    Wavlink WN531P3/WN535M1 Export Pingortrace CGI export_pingortrace.cgi strcpy stack-based overflow
    cvelistv5