CVE-2026-109109: Wavlink WL-WN530BE1-A Settings Export CGI ExportAllSettings.cgi strcpy stack-based overflow

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-13 · updated 2026-10-14
Weakness: CWE-119

Description

A vulnerability was detected in Wavlink WL-WN530BE1-A 251117. This vulnerability affects the function strcpy of the file /cgi-bin/ExportAllSettings.cgi of the component Settings Export CGI. Performing a manipulation of the argument HTTP_COOKIE/X-Cmd results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure.

Affected products

Wavlink WL-WN530BE1-A: 251117

References

https://gist.github.com/Rauzk/9ef4fe7574e5689386cc43139f4cf9e1
https://vuldb.com/cve/CVE-2026-109109
https://vuldb.com/submit/909191
https://vuldb.com/vuln/416860
https://vuldb.com/vuln/416860/cti

Get alerted when CVE-2026-109109 or the next vulnerability affects your stack