CVE-2025-13826

Check the INCIBE-CERT advisory at https://www.incibe.es/en/incibe-cert/notices/aviso/incorrect-input-validation-zervit-portable-httpweb-server for vendor-confirmed patched versions and upgrade instructions. No vendor-released patch version confirmed from available NVD data - organizations must consult the INCIBE link or contact Zervit maintainers directly. Compensating controls pending patch deployment: (1) Restrict network access to Zervit's configuration endpoints using firewall rules, allowing only trusted administrative IPs - this blocks remote exploitation but limits legitimate remote administration. (2) Deploy Zervit behind a reverse proxy (nginx, Apache) with rate limiting and request validation on configuration paths - adds latency and complexity but filters malformed requests. (3) If Zervit supports it, disable the configuration reset endpoint entirely if not operationally required - eliminates attack surface but removes legitimate reset functionality. (4) Implement automated service monitoring with restart scripts to minimize DoS impact - does not prevent exploitation but reduces attacker value and operational disruption. For internet-facing deployments where remote administration is unnecessary, blocking external access to administrative endpoints provides highest risk reduction with minimal operational impact.