CVE-2026-26239: QNAP File Station

High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A buffer overflow vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5208 and later

Affected products

• QNAP File Station: from 5.5.6.4691, before 5.5.6.5208 (fixed in 5.5.6.5208)

Published 2026-06-10. Last modified 2026-07-23.