That helpful “Summarize with AI” button? It might be secretly manipulating what your AI recommends. Microsoft security researchers have discovered a growing trend of AI memory poisoning attacks used ...

New Microsoft Cyber Pulse report outlines why organizations should observe, govern, and secure their AI transformation to move forward.

As LLMs and diffusion models power more applications, their safety alignment becomes critical. Our research shows that even minimal downstream fine‑tuning can weaken safeguards, raising a key question ...

CrashFix crashes browsers to coerce users into executing commands that deploy a Python RAT, abusing finger.exe and portable Python to evade detection and persist on high‑value systems.

Most security incidents happen in the gap between knowing what matters and actually implementing security controls ...

How modern infostealers target macOS systems, leverage Python‑based stealers, and abuse trusted platforms and utilities to ...

Our Standards of Business Conduct, our Trust Code, reflects our culture, values, and the principles that guide our behavior. Our employees use these standards to understand what is required of them, ...

Discover Microsoft’s holistic SDL for AI combining policy, research, and enablement to help leaders secure AI systems against ...

This case study examines how vulnerabilities in AI frameworks and orchestration layers can introduce supply chain risk. Using ...

Microsoft continually updates security intelligence in antimalware products to cover the latest threats and to constantly tweak detection logic, enhancing the ability of Microsoft Defender Antivirus ...

We are seeing exploitation of SolarWinds Web Help Desk via CVE‑2025‑40551 and CVE‑2025‑40536 that can lead to domain compromise; here is how to patch, hunt, and mitigate now.

Change logs for security intelligence update version 1.443.1098.0 This page lists newly added and updated threat detections included in security intelligence updates for Microsoft Defender Antivirus ...