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.
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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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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. -
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. Tailored AI insights from Microsoft Security Copilot
Empower your defenders to detect hidden patterns, harden defenses, and respond to incidents faster with generative AI.
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Microsoft Agent 365, now generally available, expands capabilities and integrations
Today we’re announcing the general availability of Agent 365, plus previews of new capabilities to discover and manage shadow AI agents, including local agents like OpenClaw and Claude Code. -
What’s new, updated, or recently released in Microsoft Security
Stay ahead of emerging threats with Microsoft’s newest security innovations and updates, delivered through the In the Loop series. -
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. -
AI-powered defense for an AI-accelerated threat landscape
Read how Microsoft is partnering with Anthropic and broader industry to use leading models, paired with our platforms and expertise, to turn AI-driven discovery into protection at scale. 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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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. -
Cross‑tenant helpdesk impersonation to data exfiltration: A human-operated intrusion playbook
Threat actors are abusing external Microsoft Teams collaboration to impersonate IT helpdesk staff and convince users to grant remote access. -
Containing a domain compromise: How predictive shielding shut down lateral movement
Domain compromise accelerates fast. Predictive shielding slowed it down. -
Dissecting Sapphire Sleet’s macOS intrusion from lure to compromise
The Microsoft Defender Security Research Team uncovered a sophisticated macOS intrusion campaign attributed to the North Korean threat actor Sapphire Sleet that abuses user driven execution and social engineering to bypass macOS security protections and steal credentials, cryptocurrency assets, and sensitive data.
