Microsoft Security Blog
Your source for the latest in cybersecurity
What’s new in Microsoft Security: August 2026
This month’s updates provide new capabilities to help organizations gain insights into agent activity, expand security coverage across supported environments, and enhance security management across their environments.
Advance Zero Trust for AI: New tools and guidance to secure AI agents and DevSecOps
Microsoft expands its Zero Trust for AI strategy to enhance security for AI and DevSecOps environments with new tools and guidance.
Securing our future: July 2026 progress report on Microsoft’s Secure Future Initiative
Microsoft’s latest Secure Future Initiative report outlines progress on secure foundations, AI-powered defense, and future-ready cybersecurity.
Beyond the benchmark: Advancing security at AI speed
Read how Microsoft Security has advanced its agentic vulnerability detection system, codename MDASH, integrating into real-world workflows across Windows, Azure, and identity systems.
Threat intelligence
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DeadLock ransomware: Breaking down a Rust-based encryptor with decentralized recovery infrastructure
Microsoft Threat Intelligence examines DeadLock ransomware, an emerging financially motivated operation distinguished by its use of decentralized infrastructure to support victim communications, negotiations, and data leak operations alongside double extortion tactics used to pressure victims. -
From open lures to cloaked gates: How a macOS ClickFix campaign learned to hide
A macOS ClickFix campaign shifted tactics from openly serving infostealer lures to hiding them behind a browser-fingerprinting gate. -
ChainDrop supply chain compromise: Anatomy of a self-propagating worm
A credential-stealing worm hidden in more than 400 compromised npm packages automatically spread across software ecosystems by republishing malicious updates.
Stay ahead of threats
Get expert insights, threat intelligence, and the latest cybersecurity reports from Security Insider.
AI and machine learning
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What’s new in Microsoft Security: August 2026
This month’s updates provide new capabilities to help organizations gain insights into agent activity, expand security coverage across supported environments, and enhance security management across their environments. -
The patch window is collapsing: Why security needs a new control plane
Organizations need protection that operates in the gap between discovery and remediation. -
Advance Zero Trust for AI: New tools and guidance to secure AI agents and DevSecOps
Microsoft expands its Zero Trust for AI strategy to enhance security for AI and DevSecOps environments with new tools and guidance.
Modernize your security operations center
Confidently secure your multicloud, multiplatform environment with Microsoft Sentinel – a cloud-native security information and event management (SIEM) solution.
Latest posts
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What’s new in Microsoft Security: August 2026
This month’s updates provide new capabilities to help organizations gain insights into agent activity, expand security coverage across supported environments, and enhance security management across their environments. -
When AI infrastructure becomes the target: Securing gateways and control points
Microsoft Threat Intelligence examines attacks on exposed AI workloads, including LiteLLM gateway exploitation, credential harvesting, persistence, and cryptomining activity. -
The patch window is collapsing: Why security needs a new control plane
Organizations need protection that operates in the gap between discovery and remediation. -
Microsoft named a Leader in the Frost Radar™: Cloud Workload Protection Platforms, 2026
Microsoft is named a visionary leader in the 2026 Frost Radar for Cloud Workload Protection Platforms, recognized for unified runtime security with Microsoft Defender for Cloud. -
Hunting MacSync Stealer infrastructure through behavioral pivots
MacSync Stealer rapidly rotates domains to evade detection, but its behavior remains consistent. -
Microsoft named a Leader in the 2026 IDC MarketScape for MDR/MXDR for the Enterprise
Microsoft is named a Leader in the 2026 IDC MarketScape for MDR services.