CVE-2026-39989: QNAP Systems Inc Download Station

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A server-side request forgery (SSRF) vulnerability has been reported to affect Download Station. If a remote attacker gains a user account, they can then exploit the vulnerability to read application data. We have already fixed the vulnerability in the following version: Download Station 5.10.1.312 and later Download Station 5.11.2.321 and later

Affected products

• QNAP Systems Inc Download Station: from 5.10, before 5.10.1.312 (fixed in 5.10.1.312); from 5.11, before 5.11.2.321 (fixed in 5.11.2.321)

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