What .NET versions does NES support?

NES for .NET supports versions 6, 8, and 9. HeroDevs provides ongoing security patches and compatibility fixes to keep your applications secure and operational beyond their official end-of-life dates.

Why do I need NES for .NET?

Using an unsupported version of .NET exposes your applications to security vulnerabilities and compliance risks. NES for .NET lets you stay on your current version and remain fully supported until you are ready to migrate.

Does NES for .NET help with compliance?

Yes. NES for .NET provides security patches for EOL versions and includes an enterprise-grade SLA that supports compliance with SOC 2, PCI DSS, HIPAA, and other regulations.

How does licensing work for NES for .NET?

When you purchase Never-Ending Support, you acquire a commercial license for the support services. Pricing is based on the number of users committing code to the project repo. Users are unnamed and transferable across team members.

Secure drop-in replacements for .NET versions 6, 8, 9

NEVER-ENDING SUPPORT FOR
.NET

Name: Never-Ending Support for .NET
Brand: HeroDevs

Legacy .NET versions still function after support ends — but that's not good enough for internal SLAs, CVE disclosures, and security audits.

Never-Ending Support (NES) for .NET keeps you compliant, secure, and audit-ready without an unplanned migration or risky patchwork.

Get Pricing

View Docs

Patch CVEs, Meet Internal SLAs, Pass Audits — in Minutes.

NES for .NET is a secure drop-in replacement for .NET version 6, 8 and 9

Why HeroDevs?

Why Customers Choose HeroDevs

Staying on Unsupported .NET

Migrating to .NET8

Security Risks

Vulnerabilities go unpatched, increasing the risk of exploits and data breaches.

Security updates require complete migration, leaving gaps during the transition.

Compliance Challenges

Costs

Resource Constraints

Time Pressure

Expertise and Support

Flexibility

Fails to meet regulatory requirements, risking fines or legal action.

Compliance is restored, but the migration process can take months or years.

Risk of financial loss from downtime or breaches.

High migration costs for developers, training, and infrastructure upgrades.

Limited developer focus as they work on patching outdated software manually.

Migration projects delay critical system maintenance, increasing long-term technical debt

Delayed upgrades increase security and operational risks.

Deadlines for migration add stress to teams and increase error risks.

No vendor support for outdated frameworks.

Up-to-date vendor support is available, but only for new versions.

Businesses are stuck with outdated software until they can allocate resources.

Migration locks organizations into a specific timeline and technology roadmap.

HeroDevs delivers ongoing security patches and vulnerability remediation for unsupported versions.

Maintains compliance by providing security and compliance updates for unsupported versions.

Cost-effective support for current infrastructure, reducing pressure to migrate prematurely.

Provides dedicated never-ending support, freeing internal teams for strategic initiatives.

Extends the lifecycle of unsupported .NET versions, allowing migration at a pace that aligns with business needs.

Offers tailored long-term support with expertise in older .NET versions, including custom patching solutions.

Provides flexibility by maintaining secure and operational systems without forcing immediate upgrades.

Get in Touch

Ready to Secure Your .NET Systems?

HeroDevs offers enterprise-grade, long-term support for .NET applications that goes far beyond basic patching.Don’t settle for limited Linux-first solutions—choose a partner who understands your needs.

Contact Us to Learn More or Schedule a Consultation Today!

Contact Us

For System & Network Admins: Keep Your .NET Endpoints Secure

As a System or Network Admin, maintaining security while keeping systems running smoothly is critical. If your vulnerability scanner has flagged Microsoft .NET 6 as obsolete, you need a fast and reliable patching solution that doesn’t require immediate migrations. With HeroDevs’ NES for .NET, you can continue receiving security patches—without the cost, complexity, or downtime of upgrading.

Your job is to keep endpoints secure—ours is to make it effortless.

0 Security Issues Fixed in NES for .NET

By purchasing HeroDevs’ Never-Ending Support for .NET, you ensure that your .NET applications stay secure and mitigate these vulnerabilities. As more CVEs are discovered, you can rest easy knowing HeroDevs will fix them.

If you’re currently using .NET in your application’s tech stack, your application is vulnerable to the CVEs listed below.

Switch to NES for .NET in minutes to immediately mitigate these vulnerabilities.

Severity

CVE

What is Never-Ending Support?

Security Fixes

A new version of NES for .NET will be released each time we find, validate, and fix a security issue.

Drop-In Compatibility

A direct replacement for your framework—no migrations, no rewrites, just ongoing support.

SLA Compliance

Our patch delivery SLA guarantees that your organization will be compliant with SOC 2, NIS2, PCI, HIPAA, and other compliance standards and regulations.

Learn more.

Team of Experts

NES for .NET is built and maintained by core team members of .NET to ensure the same excellent quality of support you expect.

Easy to Install

Our simple drop-in replacement means all you have to do is change your package.json and rebuild your project. No code changes or find & replace required.

Commercial Contract Assurances

OSS NES is not only secure and compatible, but is offered with industry-standard commercial assurances for the use of HeroDevs Services.

Learn more.

Keep Support for The Libraries You Depend On

With NES for .NET you'll receive extended support for key components that power your .NET applications. Vulnerabilities discovered in these components will be patched and released.

NES for .NET includes continued support for these .NET components:

A secure .NET Runtime to run your .NET applications.

Entity Framework to easily work with databases.

The .NET SDK to build and maintain .NET applications.

Windows Presentation Foundation (WPF) for programmatic UI development.

ASP.NET to power your .NET web apps.

WinForms for XAML-based UI development.

Want to learn more?

Talk to Our Experts

The Problem We Solve

80%

of Fortune 500 companies rely on .NET to power mission-critical systems, but unsupported versions pose severe risks. EOL .NET versions expose businesses to security vulnerabilities, compliance gaps, and expensive, disruptive migrations.

HeroDevs’ Never-Ending Support (NES) for .NET provides proactive security patches, compliance guarantees, and seamless long-term support for EOL .NET versions. Our drop-in solution keeps your systems secure and operational, so you control when—and how—to modernize, without costly downtime or risks. Let HeroDevs secure your .NET systems, ensuring your business remains compliant and protected.

Future-Proof Your .NET Applications Without Disruption

Upgrading to the latest .NET versions often introduces breaking changes that require significant code refactoring and deep analysis, disrupting workflows and delaying critical projects.

From shifting C# syntax to deprecated libraries and altered APIs, modern updates can create compatibility headaches for legacy applications. HeroDevs keeps your .NET systems secure, compliant, and compatible—eliminating disruption so you can focus on innovation, not upgrades.

Avoid the .NET Upgrade Cycle
Stay Secure and Stable with HeroDevs

The 3-year lifecycle of modern .NET LTS versions presents challenges to adopting recent versions of .NET, with their significant performance improvements, additional features, and scalability enhancements. HeroDevs' NES for .NET allows customers on .NET 4.x to move to a modern .NET LTS version and leverage the latest features with more time to plan upgrades between .NET LTS versions.

HeroDevs' Never-Ending Support (NES) for .NET allows enterprises to move to modern .NET with assurance of longer support window, more time to plan upgrades between .NET LTS versions ensures your existing .NET 4.x applications remain secure, compliant, and fully operational. Stay protected, plan migrations on your timeline, and focus on delivering value without the constant pressure to keep up with .NET’s evolving release cycle.

Why HeroDevs?

Trust the Experts Who Know .NET Best

.NET experts ensure NES for .NET is the same quality you have come to expect when using .NET open source projects.

We specifically design our NES for .NET product to work seamlessly and is as dependable as the original .NET projects you built your applications on.

We Give Back To Open Source

HeroDevs is deeply committed to the open-source community. We support it through sponsorships, backing core contributors, and funding events that drive the ecosystem forward. Our engagement extends beyond financial contributions, embodying a commitment to the ongoing growth and innovation of open-source software. This holistic support ensures the vitality of the open-source movement, fostering an environment of collaboration and advancement.

Support

Frequently Asked Questions

Below are common questions our customers have. Of course, we’re happy to meet with you and answer these and other questions you might have.

Related Products

If you're leveraging this technology, chances are you're also using complementary systems that face similar end-of-life (EOL) challenges.

Explore our related NES products that offer proactive, comprehensive support for your entire tech stack to ensure continuity, security, and innovation across all your essential technologies.

View All Products

Resources

View All Articles

Security

August 4, 2026

July 2026 .NET Patch Tuesday: 14 CVEs Also Affect .NET 6

How fourteen of Microsoft's seventeen July Patch Tuesday .NET fixes reach back into the end-of-life .NET 6 line, and why the advisory metadata will mislead your scanner