From runtime risk to real‑time defense: Securing AI agents
Why securing AI agents at runtime is essential as attackers find new ways to exploit generative orchestration.
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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Microsoft Security success stories: Why integrated security is the foundation of AI transformation
Discover how Ford, Icertis, and TriNet modernized security with Microsoft—embedding Zero Trust, automating defenses, and enabling secure AI innovation at scale. -
Resurgence of a multi‑stage AiTM phishing and BEC campaign abusing SharePoint
Microsoft Defender Researchers uncovered a multi‑stage AiTM phishing and business email compromise (BEC) campaign targeting multiple organizations in the energy sector. -
A new era of agents, a new era of posture
AI agents are transforming how organizations operate, but their autonomy also expands the attack surface. Prevent threats with Microsoft Defender
The Microsoft Defender family offers comprehensive threat prevention, detection, and response capabilities for everyone—from individuals looking to protect their family to the world’s largest enterprises.
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Four priorities for AI-powered identity and network access security in 2026
Discover four key identity and access priorities for the new year to strengthen your organization’s identity security baseline. -
Microsoft named a Leader in IDC MarketScape for Unified AI Governance Platforms
Microsoft is honored to be named a Leader in the 2025–2026 IDC MarketScape for Unified AI Governance Platforms, highlighting our commitment to making AI innovation safe, responsible, and enterprise-ready. -
Inside RedVDS: How a single virtual desktop provider fueled worldwide cybercriminal operations
Microsoft’s investigation into RedVDS services and infrastructure uncovered a global network of disparate cybercriminals purchasing and using to target multiple sectors. -
How Microsoft builds privacy and security to work hand-in-hand
Learn how Microsoft unites privacy and security through advanced tools and global compliance to protect data and build trust. Retain Microsoft Security Experts
Microsoft Security Experts are now available to strengthen your team with managed security services. Learn how to defend against threats with security experts.
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Phishing actors exploit complex routing and misconfigurations to spoof domains
Threat actors are exploiting complex routing scenarios and misconfigured spoof protections to send spoofed phishing emails, crafted to appear as internally sent messages. -
Introducing the Microsoft Defender Experts Suite: Elevate your security with expert-led services
Announcing Microsoft Defender Experts Suite, a integrated set of expert-led services that helps security teams keep pace with modern cyberattacks. -
New Microsoft e-book: 3 reasons point solutions are holding you back
Explore the new Microsoft e-book on how a unified, AI-ready platform delivers speed, resilience, and measurable security gains. -
Defending against the CVE-2025-55182 (React2Shell) vulnerability in React Server Components
CVE-2025-55182 (also referred to as React2Shell and includes CVE-2025-66478, which was merged into it) is a critical pre-authentication remote code execution (RCE) vulnerability affecting React Server Components and related frameworks.
