CVE-2025-64054: Fanvil x210 Firmware

Critical severity, CVSS 9.6. EPSS: 0.4% chance of exploitation in the next 30 days.

A reflected Cross Site Scripting (XSS) vulnerability on Fanvil x210 2.12.20 devices allows attackers to cause a denial of service or potentially execute arbitrary commands via crafted POST request to the /cgi-bin/webconfig?page=upload&action=submit endpoint.

Affected products

• Fanvil x210 Firmware: version 2.12.20 only

Published 2025-12-05. Last modified 2026-07-05.