Threat Prevention Patch Versions 8.0.0.66, 7.5.0.301 and 7.4.0.301 Released

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threat-prevention-patch-8-0-0-66
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Download versions 8.0.0.66, 7.5.0.301 or 7.4.0.301 here!

Bug Fixes and Miscellaneous Updates

  • Support for April 2026 .NET Updates We’ve added support for Microsoft’s April 2026 .NET security updates, ensuring compatibility with the latest .NET releases (versions 8, 9, and 10) and .NET Framework. These updates from Microsoft address several security vulnerabilities, including remote code execution and denial-of-service issues.
  • Support for Exchange Server SE Hotfix Update 6 (HU6) We’ve added support for the latest Exchange Server Subscription Edition hotfix (HU6, released May 7, 2026). This Microsoft update introduces Graph API support for hybrid Exchange environments, replacing the legacy EWS protocol.

Need help with this update?

There are many different ways to get help with our products!

Situation Action
If you feel the product is broken and not working as intended… Contact Support
If you have a question you’d like to ask other experts… Create a discussion in the community: Threat Prevention > Discussions & Questions
If you have a feature request… Let our product team know directly: Threat Prevention > Ideas
If you have something cool to show… Show everyone what you built: Threat Prevention > Show & Tell

What are your thoughts?

We are always happy to hear from our users on what you like, and what you hope to see in the future. Please, share your thoughts below!

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Threat Prevention Bug Fix List
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@Tania.Severina Are there issues with the 8.0.0.62 agent when the .NET update is applied without upgrading to the latest 8.0.0.66 version for example?

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Hi Justin - If the .NET update is applied without updating the agent to at least 8.0.0.66 then then NTP agent will stop collecting events from Exchange servers so NTP Exchange specific policies (if you have any NTP agents on your Exchange email servers) would stop working. No other aspect of the NTP agent would be impacted such as AD, LDAP, Authentication etc. So if you don’t have any Exchange specific policies you can ignore this update.

-Tony

More details:

Summary:

433211: 26-04 .Net updates support

435991: Exchange Server SE RTM HU6 support

Behavior before Fix:

433211: 26-04 .Net updates support

SI Exchange policies may stop working after installing the April 2026 .NET Framework updates. Affected configurations: Windows Server 2022 with .NET 4.8.1 (KB5082425) and Windows Server 2025 with .NET 4.8.1 (KB5082417), running Exchange Server SE or Exchange Server 2019 CU15. Critical errors such as “MethodDesc::GetNativeCode was not resolved” and related symbol resolution failures are reported in the NTP Agent log.

435991: Exchange Server SE RTM HU6 support

NTP Agents do not support Exchange Server SE RTM HU6.

Behavior after Fix:

433211: 26-04 .Net updates support

NTP Agents support the April 2026 .NET Framework updates; Exchange policies remain fully functional after installing these updates.

435991: Exchange Server SE RTM HU6 support

NTP Agents are fully functional with Exchange Server SE RTM HU6.

Changes since Last Hotfix:

433211: 26-04 .Net updates support

435991: Exchange Server SE RTM HU6 suppo rt

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Thank you @TSarra the details are much appreciated!