High · published December 5, 2025
🚨 A harmless-seeming POST request could bring your Fanvil x210 devices to their knees! ⚡ Think of it like a restaurant kitchen where an unexpected delivery of too many ingredients causes a chaotic overflow, blocking the chefs from working—this buffer overflow can lead to a denial of service or worse! An attacker can exploit this vulnerability, causing the device to crash or hang, disrupting your services. In worst cases, it could even allow malicious commands to be executed, turning your once-reliable device into a puppet on a string!
Think of it like a restaurant kitchen where an unexpected delivery of too many ingredients causes a chaotic overflow, blocking the chefs from working—this buffer overflow can lead to a denial of service or worse! This buffer overflow vulnerability exists in the /cgi-bin/webconfig?page=upload&action=submit endpoint of Fanvil x210 devices running version 2.12.20, where unvalidated input can lead to memory corruption and unintended behavior.
An attacker can exploit this vulnerability, causing the device to crash or hang, disrupting your services. In worst cases, it could even allow malicious commands to be executed, turning your once-reliable device into a puppet on a string! Immediately patch your devices to the latest firmware version available. Additionally, limit access to the affected endpoint and monitor your network for any suspicious activity. Regularly review your security policies to minimize potential risks. You've got this! With these steps, you'll safeguard your devices and keep your network running smoothly. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| fanvil/x210_firmware | all versions | — |