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Key Takeaways
- .NET 7 is no longer supported — migrating to a supported version like .NET 8 LTS is the best path forward.
- Running unsupported .NET versions exposes your applications to serious security and compliance risks.
- Before migrating, review and address breaking changes in the target version to ensure a smooth upgrade process.
The .NET 7 End of Life shift has been a critical situation for any organization or developer running .NET 7 applications, because continuing to use this framework past the end of support has been a risky endeavor since then. The danger stems from the fact that applications built on .NET 7 no longer receive security updates and bug fixes, and are therefore at risk to new vulnerabilities.
This article helps you navigate the release cadence of .NET versions, better handle the .NET 7 end of life transition, discover the risks you are facing due to its EOL status, and find out which options you can take to mitigate those risks.
When Does .NET 7 Reach End of Life?
.NET 7 officially reached end of life on May 14, 2024. As a Short-Term Support (STS) version, it was never intended for long-term production use. Its support window lasted just 18 months, with the end of support arriving after the release of the next Long-Term Support (LTS) version on the list, .NET 8.
Pro Tip: Plan your migration away from .NET 7 immediately to ensure your applications remain secure and compliant.
Understanding the .NET Support Lifecycle
A new major version of .NET is released every year in November. As mentioned above, Microsoft offers two types of .NET releases: Long Term Support (LTS) and Standard Term Support (STS) releases.
If you take a look at the fast-moving release cadence of these .NET release types, you’ll see part of Microsoft’s strategy:
- LTS versions (like .NET 6 and .NET 8) provide stability and multi-year support for production workloads.
- STS versions (like .NET 7 and .NET 9) have the same quality as LTS releases but carry shorter support cycles, suited for teams adopting new features quickly.
If your organization chose to adopt .NET 7 for a production environment, this short lifecycle is now a major concern. Without migration, you are now operating on a framework that will never again receive updates against emerging threats.
Long-Term Support (LTS) Releases
These are the even numbered releases, such as .NET 6 and .NET 8. When it comes to Microsoft’s life-cycle support policy, LTS versions receive active support for three years, a period during which they continue to get free security patches and performance improvements. They make the best choice for enterprise applications and mission-critical systems where stability and long-term maintenance support are essential.
Standard Term Support (STS) Releases
These are the odd numbered releases, such as .NET 7 and .NET 9. The .NET support policies dictate that STS versions are provided with a shorter support period, which is just 18 months from the date of their release.
Note: As of now, there are only two .NET releases with active support: .NET version 8 (LTS) and .NET 9 (STS). According to the official release cadence roadmap, .NET 10 LTS is expected to come out in November, 2025.
You can also learn more about the upcoming .net 8 end of life and how it affects your long-term planning in our detailed breakdown.
Microsoft .NET Support Timelines
|
Version |
Release Date |
End of Life |
Status |
|
.NET 9 |
12 November, 2024 |
12 May, 2026 |
Active |
|
.NET 8 |
14 November, 2023 |
10 November, 2026 |
Active |
|
.NET 7 |
8 November, 2022 |
14 May, 2024 |
Out of support |
|
.NET 6 |
8 November, 2021 |
12 November, 2024 |
Out of support |
What Are the Risks of Staying on .NET 7?
One of the common questions after a software reaches its end of life is, “What happens if I don’t upgrade to the latest release?” In simplest terms, if you continue using an end-of-life version without receiving security fixes, you will be exposed to serious and escalating risks, which can result in security, compliance, and financial consequences.
Unpatched Security Vulnerabilities
After the EOL date, Microsoft stops providing security updates for that particular version, and, as a result, any newly discovered vulnerabilities will remain unpatched. Without this patch support, critical unpatched vulnerability can be the entry point for a data breach, ransomware attack, or other unfortunate security surprises popping up in your security vulnerability scans.
Non-Compliance and Legal Risks
For organizations in regulated industries like healthcare (HIPAA) or finance (PCI DSS), using unsecured software past the official support dates means serious compliance violations. Many industry standards and regulations require you to maintain secure, up-to-date systems to protect sensitive data. Operating on frameworks outside of their support periods leaves you non-compliant, which can result in hefty fines, legal action, and a significant loss of customer trust.
Growing Technical Debt and Cost
While delaying a migration may save money in the short term, it can be more costly down the road. The longer you put off upgrading, the more technical debt accumulates. This makes the eventual migration more complex, time-consuming, and expensive. As the gap between .NET version 7 and current versions widens, you will encounter:
Compatibility Issues: Integration with new libraries and third-party tools becomes more difficult.
Increased Maintenance Support Needs: Your team will spend more time on costly workarounds and custom fixes for issues that would be resolved with a simple patch on a supported version.
With .NET 7 out of support, existing projects aren’t affected, but building .NET 6 or .NET 8 apps now requires the .NET 8 SDK. Developers can also remove the outdated .NET 7 components from their installations using the “remove out of support components” option.
Note: Microsoft strongly recommends upgrading to a supported version and removing unsupported releases from your systems.
Upgrading Is Your Only Option During the .NET 7 End of Life Period
For organizations still running applications on .NET version 7, upgrading is the safest option to regain security and stability. Since .NET 7 is an STS (Standard Term Support) version, there are no extended support services available directly from Microsoft to provide continued security updates.
Upgrade to .NET 8 LTS
You can upgrade your .NET version 7 to the current LTS version, .NET 8, which will be supported until November 2026. You can also choose .NET 9, however it is an STS release, and will reach its end of life earlier than that, in May 2026.
To complete the upgrade process from .NET 7 to .NET 8, you will need to update the development and hosting environment. Then, you will need to change the value of the TargetFramework property in your project file to the target version, which would be version 8. However, the process is rarely simple sometimes, particularly if the breaking changes in .NET 8 affect your application. You can find the list of breaking changes on the official website and refactor your code to ensure your applications run smoothly without any errors.
Pro Tip: Always perform the migration in a staging environment first, as this will allow you to identify the breaking changes and fix them beforehand instead of generating production downtime.
Staying Secure Beyond the Deadline
Upgrading to a supported .NET version requires a strategic approach and careful planning, especially to handle breaking changes.
However, when taking a look at potential migration strategies available to your company, an upgrade may not be immediately feasible. In such scenarios, security solutions like extended support can bridge the gap for LTS releases like .NET 6, which reached its end of life in November 2024.
TuxCare’s Endless Lifecycle Support (ELS) delivers ongoing security patches for .NET 6 applications, as well as several other open source projects, far beyond the vendor-supported lifecycle. This means you can stay secure and compliant while you plan for a migration that suits your timeline. ELS for .NET 6 is available for both Windows and Linux environments.
If you have questions about managing EOL software or want to learn more about how TuxCare’s ELS can protect your .NET 6 applications, our security experts are here to help. Contact us today.
