CVE-2025-33031: QNAP File Station

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

An improper certificate validation vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.4847 and later

Affected products

• QNAP File Station: from 5.5.6.4691, before 5.5.6.4847 (fixed in 5.5.6.4847)

Published 2025-06-06. Last modified 2026-06-17.