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Microsoft Security Blog - 1

2026 (8)

September (3)

security: From guidance to action: Security fundamentals that materially reduce risk

Microsoft Security Blog

2026-09-17

Microsoft says AI has changed the cybersecurity operating environment and points readers to exposure management guidance with recommended controls. The post emphasizes taking action on security fundamentals to reduce risk.

security: How to secure edge AI in customer-owned environments

Microsoft Security Blog

2026-09-04

Microsoft says edge AI deployments in customer-owned environments require stronger verification of systems, software, and AI assets before sharing sensitive data, credentials, or models. The post frames secure edge AI as a trust and validation problem for third-party environments.

security: Impersonating IT support: how threat actors turn a remote session into enterprise-wide access

Microsoft Security Blog

2026-09-02

Microsoft Threat Intelligence reported a human-operated intrusion campaign that abuses Microsoft Teams external collaboration to impersonate IT support, gain remote access, and deploy a Node.js-based implant. The campaign uses social engineering and legitimate tools to move from initial access to lateral movement, with Microsoft Defender used for detection and disruption.

August (2)

security: Hunting MacSync Stealer infrastructure through behavioral pivots

Microsoft Security Blog

2026-08-18

Microsoft describes how it tracked MacSync Stealer infrastructure despite rapid domain rotation by using stable behavioral pivots. The investigation identified more than 30 related domains.

security: From open lures to cloaked gates: How a macOS ClickFix campaign learned to hide

Microsoft Security Blog

2026-08-05

Microsoft describes a macOS ClickFix campaign that changed from openly delivering infostealer lures to placing them behind a browser-fingerprinting gate. The shift reduces visibility of the malicious infrastructure but also creates new detection opportunities for defenders.

July (2)

security: Email threat landscape: Q2 2026 trends and insights

Microsoft Security Blog

2026-07-23

Microsoft reports that Q2 2026 saw continued declines in several phishing techniques after disruption of the Tycoon2FA platform. Attackers shifted toward Teams-based social engineering and more automated, multi-stage attack chains.

security: 5 insights from Frost & Sullivan’s 2025 Frost Radar™ for Cloud Security Posture Management

Microsoft Security Blog

2026-07-06

Microsoft summarizes five takeaways from Frost & Sullivan’s 2025 Frost Radar for Cloud Security Posture Management, highlighting a shift from point-in-time compliance to continuous risk management. The post frames CSPM as evolving toward broader, ongoing cloud security oversight.

June (1)

security: Securing AI agents: When AI tools move from reading to acting

Microsoft Security Blog

2026-06-30

The post explains MCP tool poisoning as an attack that can turn trusted AI agents into a control plane for data loss. It describes how attackers manipulate tool descriptions to induce unauthorized actions, and outlines detection, containment, and prevention approaches.