CVE-2026-109109 Wavlink WL-WN530BE1-A Settings Export CGI ExportAllSettings.cgi strcpy stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Wavlink WL-WN530BE1-A router's settings export CGI, potentially leading to arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109109?
CVE-2026-109109 is a critical memory corruption vulnerability in Wavlink WL-WN530BE1-A, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-109109?
How do I fix CVE-2026-109109?
No fix has been published for CVE-2026-109109 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-109109 being exploited?
There is no known exploitation of CVE-2026-109109 in the wild and no public exploit code.
Sources
Also known as GHSA-6v7p-w7m8-6jfj.