Enhancing AI security through global AI red teaming
Microsoft’s External Red Team Alliance (EXTRA) is a global AI security initiative designed to advance AI safety research and red teaming.
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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Email threat landscape: Q2 2026 trends and insights
In the second quarter of 2026, the continuing effects of Microsoft’s disruption of the Tycoon2FA phishing platform contributed to sustained declines in several major phishing techniques, while threat actors expanded into Teams-based social engineering and employed increasingly automated and multi-stage attack chains. -
ACR Stealer: Two observed intrusion chains amid increased threat activity
From late April 2026 to mid-June 2026, Microsoft Defender Experts observed increased ACR Stealer activity across customer environments. -
Least privilege for AI agents: Identity, access, and tool binding
As AI agents become more autonomous, strong identity, access, and auditing controls are critical to keeping them secure. 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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Unpacking the AsyncAPI npm supply chain compromise and import-time payload delivery
Threat actors compromised AsyncAPI packages and weaponized trusted CI/CD workflows to distribute malware through npm. -
Turning threat intelligence into decisive action with Defender Experts
Security teams have never had more visibility, yet rarely have they felt more uncertain. -
Defending SaaS-based applications against ShinyHunters OAuth abuse
Microsoft Threat Intelligence identified threat actor activity with overlapping tradecraft commonly associated with ShinyHunters, including voice phishing (vishing), supply-chain compromise, and misconfigured guest access targeting SaaS-based applications. -
Protecting Microsoft at AI speed: How SFI proactively hardens our cloud
At Microsoft we encompass these security requirements, along with threat knowledge, and operational frameworks in our Secure Future Initiative (SFI), to guide what a well-defended cloud service looks like. 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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Securing AI agents: When AI tools move from reading to acting
MCP tool poisoning turns trusted AI agents into a control plane for data loss. -
Chromium extension uses AI‑related branding to redirect browser search
A malicious Chromium-based extension that spoofs the AI-powered answer engine Perplexity AI redirects browser search traffic using MV3 APIs and intermediary infrastructure. -
Photo ZIP campaign targeting hospitality industry delivers Node.js implant for persistent access
Microsoft Threat Intelligence identified an active multi-stage intrusion campaign targeting hospitality organizations in Europe and Asia. -
StealC and Amadey: Breaking down infostealers and the cybercrime services that deliver them
On June 24, 2026, Microsoft’s Digital Crimes Unit (DCU) facilitated the takedown, suspension, and blocking of domains that formed the backbone of the StealC and Amadey infrastructure.
