Microsoft Office 2021 End of Life Date
Microsoft Office 2021 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
Microsoft Office 2021 was released on October 5, 2021 and support is scheduled to end on October 13, 2026 — a planned supported lifespan of 5 years, shorter than the 7 years and 1 month median for Microsoft Office releases. It is not an LTS release; Microsoft Office reserves longer patch windows for its LTS versions.
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →| Version | Latest | EOL Date | Status |
|---|---|---|---|
| 2007 SP3 | — | Oct 10, 2017 | EOL |
| 2008 for Mac SP2 | — | Apr 9, 2013 | EOL |
| 2010 SP2 | — | Oct 13, 2020 | EOL |
| 2011 for Mac SP3 | — | Oct 10, 2017 | EOL |
| 2013 SP1 | — | Apr 11, 2023 | EOL |
| 2016 | — | Oct 14, 2025 | EOL |
| 2019 | — | Oct 14, 2025 | EOL |
| → 2021 | — | Oct 13, 2026 | Warning |
What does Microsoft Office 2021 end of life mean?
When Microsoft Office 2021 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 Microsoft Office 2021 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Microsoft Office 2024 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.