End of life
QNAP QTS 4.2.6, 4.3.3, 4.3.6, 4.4.1 (legacy, hardware-tied)
All published support, including security fixes, has ended. The published end-of-support date was 2022-10 — 1372 days ago.
Scope: software releaseAs of 2026-08-01
Lifecycle timeline
- 2022-10 — End of support · End of standard support
Why this status?
Feb 2022 QNAP announcement extended critical/high security updates for select models still running these QTS versions through October 2022. This is a one-time extension cutoff, not each version's original EOL date.
QTS releases still inside the support window
- QTS 5.2 (LTS) — support ends 2029-08
Reported as still supported by the cited source. QNAP documents the upgrade path for your edition and contract — confirm there before planning change work.
Evidence
- QNAP Product Support Status (model lookup) Official · checked 2026-07-15
- QNAP FAQ: How to check product support status Official · checked 2026-07-15
- QNAP Announces Long-term Support for QTS 5.2 and QuTS hero h5.2 (Nov 2024) Official · checked 2026-07-15
- QNAP Extends Security Updates for EOL Products (Feb 2022) Official · checked 2026-07-15
Keep going
- All QNAP QTS lifecycle dates· 2 tracked releases
- QNAP QTS security advisories· 2 tracked
- Free CVE email alerts for QNAP
Status derived deterministically from the published milestones. When a vendor does not publish a date, this page says so — it never guesses.