Microsoft Defender Antivirus security intelligence August-2025

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Microsoft Defender Antivirus security intelligence and product updates - Microsoft Defender for Endpoint

August-2025 (Platform: 4.18.25080.5 | Engine: 1.1.25080.5)​

• Security intelligence update version: 1.437.1.0
  
• Release date: September 16, 2025 (Engine) / September 17, 2025 (Platform)
  
• Platform: 4.18.25080.5
  
• Engine: 1.1.25080.5
  
• Support phase: Security and Critical Updates
  

What's new​: Improved Defender update reliability by allowing non-admin processes to trigger shared signature updates, reducing unnecessary privilege requirements.