.NET Framework 3.x — End of Life
Active.NET Framework 3.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status |
|---|---|---|---|---|---|
| 3.5-sp1 | Nov 19, 2007 | — | Jan 9, 2029 | — | Active |
CVEs affecting .NET Framework 3.x (0)
.NET Framework 3.x will reach end of life — migrate to .NET Framework 4.x
.NET Framework 4.x is the next major release. Plan your upgrade before .NET Framework 3.x stops receiving security patches.
Frequently asked questions
Is .NET Framework 3 end of life?
No. .NET Framework 3.x is still supported until January 9, 2029. It continues to receive security patches and bug fixes.
What CVEs affect .NET Framework 3?
No CVEs are currently tracked for .NET Framework 3.x in our database. This may mean no vulnerabilities have been recorded yet, or the data is still syncing.
What is the latest .NET Framework 3 version?
Check the version table above for the latest .NET Framework 3.x patch release.
How to migrate from .NET Framework 3 to .NET Framework 4?
To migrate from .NET Framework 3 to .NET Framework 4: (1) review the official .NET Framework 4 migration guide for breaking changes, (2) update dependencies and configuration accordingly, (3) test thoroughly in a staging environment, (4) deploy with a rollback plan. Starting early gives you time to resolve compatibility issues before your current version reaches end of life.
Is it safe to run .NET Framework 3 in production?
.NET Framework 3 is still supported and safe for production use until January 9, 2029. Ensure you are running the latest patch version to have all security fixes applied.
Data sourced from endoflife.date · CVE data from NVD · EPSS from FIRST.org · KEV from CISA