AI and agents Insights | Microsoft Security Blog

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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October 1 4 min read

Preparing governments for an era of interconnected cyber risk

According to this year’s Microsoft Digital Defense Report, government agencies and services were the sector most impacted by cyber threats in 2026, accounting for 27% of observed activity, up from 17% in 2025.
September 30 7 min read

Secure what’s next: Your guide to Microsoft Security at Microsoft Ignite 2026

This year at Microsoft Ignite, we spotlight our AI-first, end-to-end security platform designed to protect identities, devices, data, applications, clouds, infrastructure, and the AI agents now working alongside your teams.
September 25 9 min read

Storm-3168: Agentic-driven cloud attacks using compromised service principals

Microsoft details JADEPUFFER-linked Azure reconnaissance, resource deletion, and credential access using compromised service principals, identifying the activity as associated with Storm-3168 and providing guidance for defenders.
September 24 3 min read

What’s new in Microsoft Security: September 2026

This month’s updates help you discover and control local AI agents, extend Zero Trust to agent traffic, and strengthen SOC foundations.
Retain Microsoft Defender Experts

Microsoft Defender Experts are available to strengthen your teams with expertise when and where you need it. Learn how to elevate your security with expert-led services.

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September 23 3 min read

Reimagining the SOC for the agentic era in Microsoft Defender

We are announcing ISOC in Microsoft Defender: a foundation built for agentic security that brings leading solutions for SIEM and threat protection together.
September 17 4 min read

From guidance to action: Security fundamentals that materially reduce risk

AI has made fundamental changes to the operating environment for cybersecurity.
September 17 3 min read

Improving email security outcomes with real-world Microsoft Defender insights

The latest email security benchmarking reports show strong Microsoft Defender performance across pre-delivery and post-delivery scenarios and reveal where threats and defenses continue to evolve.
September 10 9 min read

Protecting organizations from AI-assisted executive impersonation and invoice fraud

Microsoft examines an AI-assisted business email compromise campaign that used executive impersonation and fake invoices to target finance teams with ACH payment fraud.
Go beyond data protection with Microsoft Purview

Govern, protect, and manage all of your data with Microsoft Purview, comprehensive solutions to help give you better visibility and control.

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September 10 5 min read

Detect and disrupt AI-themed attacks with Microsoft Defender

See how Microsoft Defender detects and disrupts AI-themed phishing, malware, and multi-stage attacks across the attack chain.
September 3 17 min read

ASCII smuggling crosses over from AI prompt injection to phishing evasion

Invisible Unicode characters popularized for hiding instructions from AI models are now being used to obfuscate words before email filters parse them.
August 27 2 min read

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.
August 25 6 min read

The patch window is collapsing: Why security needs a new control plane

Organizations need protection that operates in the gap between discovery and remediation.