CVE-2026-34009: QNAP Systems Inc Notes Station 3

High severity, CVSS 8.4. EPSS: 0.1% chance of exploitation in the next 30 days.

An improper isolation or compartmentalization vulnerability has been reported to affect Notes Station 3. If a local attacker gains an administrator account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: Notes Station 3 3.9.11 and later

Affected products

• QNAP Systems Inc Notes Station 3: from 3.9, before 3.9.11 (fixed in 3.9.11)

Published 2026-10-15. Last modified 2026-10-15.