QNAP NAS IS-400 Pro · Version Status

QNAP NAS IS-400 Pro End of Life Date

QNAP NAS IS-400 Pro end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.

QNAP NAS IS-400 Pro is past end of life. This version no longer receives security patches. Past EOL — migrate to a supported version immediately.
EOL Date
date not published
Past EOL
Latest Release
IS-400 Pro
Standard release
Release Date
QNAP NAS IS-400 Pro series
← QNAP NAS HS-251 All QNAP NAS versions QNAP NAS SS-EC1279U-SAS-RP →
65 / 100
High Risk
EOL Risk Score™  How is this calculated? →
EOL Recency
35/40
Attack Surface
10/30 Medium tier
CISA KEV Exposure
20/20 Named in CISA KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build. Methodology →  ·  View score card →
Recommended upgrade path
QNAP NAS EJ1600
Latest release: EJ1600 · EOL: Supported
View full QNAP NAS timeline →
Extended Support
Extended QNAP NAS IS-400 Pro support is available

Commercial vendors offer security patches beyond EOL. Compare your options.

Compare Options →
All QNAP NAS Versions
VersionLatestEOL DateStatus
TVS-871U-RP TVS-871U-RP Supported EOL
TVS-871 TVS-871 Supported EOL
TVS-671 TVS-671 Supported EOL
TVS-471U-RP TVS-471U-RP Supported EOL
TVS-471U TVS-471U Supported EOL
TVS-471 TVS-471 Supported EOL
TVS-1271U-RP TVS-1271U-RP Supported EOL
TS-EC879U-RP TS-EC879U-RP Supported EOL

What does QNAP NAS IS-400 Pro end of life mean?

When QNAP NAS IS-400 Pro reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.

The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running QNAP NAS IS-400 Pro past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.

Migrate to QNAP NAS EJ1600 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.

Frequently Asked Questions
When does QNAP NAS IS-400 Pro reach end of life?
QNAP NAS IS-400 Pro has already reached end of life, though the vendor has not published an exact date.
Is QNAP NAS IS-400 Pro still supported?
No. QNAP NAS IS-400 Pro reached end of life on date not published and is no longer receiving security patches.
What should I upgrade to from QNAP NAS IS-400 Pro?
The recommended upgrade from QNAP NAS IS-400 Pro is QNAP NAS EJ1600 — the latest actively supported version. Check the QNAP NAS full timeline for all supported versions.
What are the security risks of running QNAP NAS IS-400 Pro past EOL?
When QNAP NAS IS-400 Pro reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL QNAP NAS should migrate immediately or implement compensating controls.
Data from endoflife.date API · Generated at build time · How we source data →