CVE-2025-66278: QNAP File Station

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A path traversal vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5190 and later

Affected products

• QNAP File Station: from 5.5.6.4691, before 5.5.6.5190 (fixed in 5.5.6.5190)

Published 2026-02-11. Last modified 2026-06-17.