Vulnerability · Published Oct 13, 2026 · Assigned by VulDB

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

Critical 10.0

In plain English

A critical-severity stack buffer overflow in WL-WN530BE1-A from Wavlink. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.6%top 51.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Wavlink	WL-WN530BE1-A	251117

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C

References

VDB-416860 | Wavlink WL-WN530BE1-A Settings Export CGI ExportAllSettings.cgi strcpy stack-based overflow vdb-entry, technical-description
VDB-416860 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-109109 | CVE Analysis and Report third-party-advisory
Submit #909191 | Wavlink WL-WN530BE1-A M30BE1_V251117 Stack-based Buffer Overflow third-party-advisory
https://gist.github.com/Rauzk/9ef4fe7574e5689386cc43139f4cf9e1 broken-link, exploit