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defender-endpoint/microsoft-defender-antivirus-updates.md

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@@ -3,7 +3,7 @@ title: Microsoft Defender Antivirus security intelligence and product updates
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description: Manage how Microsoft Defender Antivirus receives protection and product updates.
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ms.service: defender-endpoint
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ms.localizationpriority: high
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ms.date: 06/23/2025
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ms.date: 07/23/2025
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audience: ITPro
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ms.topic: reference
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author: emmwalshh
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- Serviceability improvements
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- Integration improvements (Cloud, [Microsoft Defender XDR](/defender-xdr/microsoft-365-defender))
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### June-2025 (Platform: 4.18.25060.7 | Engine: 1.1.25060.6)
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- Security intelligence update version: **1.433.2.0**
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- Release date: **July 22, 2025 (Engine)** / **July 22, 2025 (Platform)**
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- Platform: **4.18.25060.7**
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- Engine: **1.1.25060.6**
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- Support phase: **Security and Critical Updates**
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#### What's new
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- Added filtering to improve scan stability and prevent engine crashes
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- Additional performance improvements to prevent concurrent scans. This change ensures that if a quick or full scan is already running, no additional quick or full scan scans are initiated from `MpCmdRun` or Powershell (`Start-Scan`).
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- Resolved the issue where subfolder exclusions were not being honored in Microsoft Defender Antivirus scans related to non-Microsoft SIEM solutions. This fix ensures that specified subfolders are now correctly excluded from scans, preventing unnecessary detections and improving overall system performance.
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### May-2025 (Platform: 4.18.25050.5 | Engine: 1.1.25050.6)
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- Security intelligence update version: **1.431.19.0**
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- Improved performance for [Smart App Control](/windows/apps/develop/smart-app-control/overview) (SAC) trusted file handling.
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- Improved [device control](/defender-endpoint/device-control-overview) logic for offline printers.
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### March-2025 (Platform: 4.18.25030.2 | Engine 1.1.25030.1)
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- Security intelligence update version: **1.427.3.0**
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- Release date: **April 1, 2025** (Engine) / **April 9, 2025** (Platform)
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- Platform: **4.18.25030.2**
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- Engine: **1.1.25030.1**
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- Support phase: **Security and Critical Updates**
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#### What's new
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- Improved caching of [device control settings](device-control-policies.md) to improve reliability in occasionally connected environments.
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- Performance improvement in on-access scans of files in network locations.
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- Fixed the Defender service description to match the latest installed version.
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- Improved Defender engine update logic when the update is included in a custom image.
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- Fix in health reporting where signature update data might have been incorrect.
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- Fixed reporting issue with [controlled folder access](controlled-folders.md) (CFA) protected folders using the PowerShell cmdlet [Get-MpPreference](/powershell/module/defender/get-mppreference) when CFA is disabled.
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- Improved performance when scanning UPX-packed files (Ultimate Packer for eXecutables) and updated the validation process to verify the integrity of the packed file itself.
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- Added support for distinguishing regular cloud allow signatures from clean [Indicators of Compromise](indicators-overview.md) (IoC) in [attack surface reduction](attack-surface-reduction.md) (ASR).
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### Previous version updates: Technical upgrade support only
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After a new package version is released, support for the previous two versions is reduced to technical support only. For more information about previous versions, see [Microsoft Defender Antivirus updates: Previous versions for technical upgrade support](msda-updates-previous-versions-technical-upgrade-support.md).

defender-endpoint/msda-updates-previous-versions-technical-upgrade-support.md

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author: emmwalshh
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ms.localizationpriority: medium
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ms.reviewer: pahuijbr
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ms.date: 07/23/2025
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manager: deniseb
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audience: ITPro
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## Engine and platform updates
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### March-2025 (Platform: 4.18.25030.2 | Engine 1.1.25030.1)
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- Security intelligence update version: **1.427.3.0**
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- Release date: **April 1, 2025** (Engine) / **April 9, 2025** (Platform)
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- Platform: **4.18.25030.2**
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- Engine: **1.1.25030.1**
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- Support phase: **Technical upgrade support (only)**
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#### What's new
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- Improved caching of [device control settings](device-control-policies.md) to improve reliability in occasionally connected environments.
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- Performance improvement in on-access scans of files in network locations.
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- Fixed the Defender service description to match the latest installed version.
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- Improved Defender engine update logic when the update is included in a custom image.
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- Fix in health reporting where signature update data might have been incorrect.
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- Fixed reporting issue with [controlled folder access](controlled-folders.md) (CFA) protected folders using the PowerShell cmdlet [Get-MpPreference](/powershell/module/defender/get-mppreference) when CFA is disabled.
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- Improved performance when scanning UPX-packed files (Ultimate Packer for eXecutables) and updated the validation process to verify the integrity of the packed file itself.
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- Added support for distinguishing regular cloud allow signatures from clean [Indicators of Compromise](indicators-overview.md) (IoC) in [attack surface reduction](attack-surface-reduction.md) (ASR).
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### February-2025 (Platform 4.18.25020.1009 | Engine: 1.1.25020.1007)
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- Security intelligence update version: **1.425.1.0**

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