Microsoft Defender
Microsoft Defender helps prevent, detect, and respond to attacks across devices, identities, apps, email, data, workloads, and clouds. Explore threat intelligence, capabilities, and real-world guidance to help you get more out of Defender.
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Defender Experts now offers 24/7, expert-driven protection for cloud workloads, beginning with hybrid and multicloud servers in Microsoft Defender for Cloud. -
Modernize your identity defense with Microsoft Identity Threat Detection and Response
Microsoft’s Identity Threat Detection and Response solution integrates identity and security operations to provide proactive, real-time protection against sophisticated identity-based cyberthreats. -
Frozen in transit: Secret Blizzard’s AiTM campaign against diplomats
Microsoft Threat Intelligence has uncovered a cyberespionage campaign by the Russian state actor we track as Secret Blizzard that has been ongoing since at least 2024, targeting embassies in Moscow using an adversary-in-the-middle (AiTM) position to deploy their custom ApolloShadow malware. -
Sploitlight: Analyzing a Spotlight-based macOS TCC vulnerability
Microsoft Threat Intelligence has discovered a macOS vulnerability, tracked as CVE-2025-31199, that could allow attackers to steal private data of files normally protected by Transparency, Consent, and Control (TCC), including the ability to extract and leak sensitive information cached by Apple Intelligence. -
Disrupting active exploitation of on-premises SharePoint vulnerabilities
Microsoft has observed two named Chinese nation-state actors, Linen Typhoon and Violet Typhoon, exploiting vulnerabilities targeting internet-facing SharePoint servers. -
Microsoft Sentinel data lake: Unify signals, cut costs, and power agentic AI
We’re evolving our industry-leading Security Incidents and Event Management solution (SIEM), Microsoft Sentinel, to include a modern, cost-effective data lake. -
Transparency on Microsoft Defender for Office 365 email security effectiveness
Microsoft believes in transparently sharing performance data from Microsoft Defender for Office 365, and other ecosystem providers, to help customers evaluate email security solutions and make decisions to layer for defense in depth. -
Microsoft is named a Leader in the 2025 Gartner® Magic Quadrant™ for Endpoint Protection Platforms
We are honored to be recognized once again as a Leader in the 2025 Gartner® Magic Quadrant™ for Endpoint Protection Platforms—our sixth consecutive time. -
Protecting customers from Octo Tempest attacks across multiple industries
To help protect and inform customers, Microsoft highlights protection coverage across the Microsoft Defender security ecosystem to protect against threat actors like Octo Tempest. -
Forrester names Microsoft a Leader in the 2025 Zero Trust Platforms Wave™ report
Employing a Zero Trust strategy is an effective way to modernize security infrastructure to protect against ever evolving security challenges. -
Learn how to build an AI-powered, unified SOC in new Microsoft e-book
Read Coordinated Defense: Building an AI-powered, unified SOC, the new e-book on how organizations can unify security operations to better meet the challenges of today’s cyberthreat landscape. -
Planning your move to Microsoft Defender portal for all Microsoft Sentinel customers
Microsoft is transitioning Microsoft Sentinel into the Microsoft Defender portal to create a unified security operations experience.