Defense in depth for autonomous AI agents
As AI agents gain autonomy, defense in depth must evolve, with application-layer design, identity, and human oversight at the center.
Actionable threat insights
Get timely insights into emerging vulnerabilities, first‑finder discoveries, and evolving cyberattacker behaviors. Explore deep research and real‑world Microsoft Defender scenarios that show how proactive detection and quick action help organizations prevent compromise.
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When configuration becomes a vulnerability: Exploitable misconfigurations in AI apps
Exposed UIs, weak authentication, and risky defaults could turn cloud-native AI apps on Kubernetes into potential targets by threat actors. -
Accelerating detection engineering using AI-assisted synthetic attack logs generation
What if you could generate realistic attack telemetry on demand? Explore research methods that translate attacker behaviors (TTPs) into synthetic logs that can trigger detections at scale and without sensitive data. -
Undermining the trust boundary: Investigating a stealthy intrusion through third-party compromise
Microsoft Incident Response investigated an attack operated through legitimate and trusted administrative mechanisms to blend seamlessly into routine operations and remain undetected demonstrating that intrusions have increasingly avoided using noisy exploits, obvious malware, or custom tooling, instead leveraging systems that organizations already trust within their environments. 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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Active attack: Dirty Frag Linux vulnerability expands post-compromise risk
Dirty Frag is a newly disclosed Linux local privilege escalation vulnerability affecting kernel networking and memory-fragment handling components including esp4, esp6, and rxrpc. -
When prompts become shells: RCE vulnerabilities in AI agent frameworks
New research exposes how prompt injection in AI agent frameworks can lead to remote code execution. -
ClickFix campaign uses fake macOS utilities lures to deliver infostealers
Threat actors are targeting macOS users with fake utility fixes that trick them into running malicious Terminal commands. -
Breaking the code: Multi-stage ‘code of conduct’ phishing campaign leads to AiTM token compromise
Microsoft Defender Research observed a large-scale credential theft campaign that exemplifies this trend, using code of conduct-themed lures, a multi-step attack chain, and legitimate email services to distribute fully authenticated messages from attacker-controlled domains. Modernize your Security Operations Center with Microsoft Sentinel
Microsoft Sentinel is a cloud-native SIEM solution powered by AI and automation that delivers intelligent security analytics across your entire enterprise.
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CVE-2026-31431: Copy Fail vulnerability enables Linux root privilege escalation across cloud environments
A high-severity Linux vulnerability, “Copy Fail” (CVE-2026-31431), enables root privilege escalation across cloud environments and Kubernetes workloads. -
Email threat landscape: Q1 2026 trends and insights
In early 2026, email threats increased with a rise in credential phishing, QR code phishing, and CAPTCHA-gated campaigns, highlighted by Microsoft’s disruption of the Tycoon2FA phishing platform which led to a 15% volume decrease and shifts in threat actor tactics. -
Simplifying AWS defense with Microsoft Sentinel UEBA
Learn how Microsoft Sentinel UEBA helps defenders distinguish benign AWS activity from attacker behavior by enriching raw CloudTrail logs with clear, binary behavioral signals derived from baseline user, peer, and device behavior patterns. -
Detection strategies across cloud and identities against infiltrating IT workers
The shift to remote and hybrid work since the pandemic expanded global hiring and accelerated digital onboarding, increasing reliance on online identity verification and remote access.
