CVE-2025-12387 Denial of Service in Pix-Link LV-WR21Q
Remote attackers can cause a denial of service on the Pix-Link LV-WR21Q administrator panel by sending a crafted HTTP POST request with an invalid language parameter.
- 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-2025-12387?
CVE-2025-12387 is a medium-severity denial of service vulnerability in Pix-Link LV-WR21Q, published on 27 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Pix-Link LV-WR21Q router's language module allows remote attackers to trigger a denial of service (DoS) by sending a specially crafted HTTP POST request containing non-existing language parameter. This renders the server unable to serve correct lang.js file, which causes administrator panel to not work, resulting in DoS until the language settings is reverted to a correct value. The Denial of Service affects only the administrator panel and does not affect other router functionalities.
The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only version V108_108 was tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.
Weakness: CWE-754
Which versions are affected by CVE-2025-12387?
How do I fix CVE-2025-12387?
No fix has been published for CVE-2025-12387 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-12387 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-12387 exists.
Sources
Also known as GHSA-292q-v67v-f66g.