Office Online Server Office Online Server · Version Status
Office Online Server Office Online Server End of Life Date
Office Online Server Office Online Server end-of-life date, support status, and CVE risk. Dates read at the vendor's own lifecycle pages (learn.microsoft.com); the source of each date is on the product page.
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Office Online Server Office Online Server reaches end of life on December 31, 2026. Plan your migration now — 73 days remaining.
📅 Get reminded before Office Online Server Office Online Server reaches EOL on December 31, 2026 — alerts 90, 30 & 7 days out.
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EOL Date
Dec 31, 2026
73 days remaining
Latest Release
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Standard release
Release Date
May 4, 2016
Office Online Server Office Online Server series
Where these dates come from
End of lifeDec 31, 2026Vendor's own page, checked by a person · learn.microsoft.com · checked Oct 17, 2026high · 2 sources agree ReleaseMay 4, 2016Our catalog, built from the vendor pages · learn.microsoft.commedium · 1 source agrees Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
Office Online Server 2016 was released on May 4, 2016 and support is scheduled to end on December 31, 2026 — a planned supported lifespan of 10 years and 8 months.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in 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 →
Extended Support
Extended Office Online Server Office Online Server support options
Some vendors and third parties sell security patches beyond end of life; whether one covers this version varies. Compare your options.
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All Office Online Server Versions
What does Office Online Server Office Online Server end of life mean?
When Office Online Server Office Online Server 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: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Office Online Server Office Online Server past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to a supported version or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Office Online Server Office Online Server reach end of life?
Office Online Server Office Online Server reaches end of life on December 31, 2026. That is 73 days remaining.
Is Office Online Server Office Online Server still supported?
Office Online Server Office Online Server is still supported but approaching end of life on December 31, 2026. Begin planning your migration now.
What should I upgrade to from Office Online Server Office Online Server?
What are the security risks of running Office Online Server Office Online Server past EOL?
When Office Online Server Office Online Server reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Office Online Server should migrate immediately or implement compensating controls.