Microsoft software and cloud platforms underpin enterprise systems, so vulnerabilities and security advisories can affect identity, data, and operations.
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Background for this topic.
Microsoft is a technology company whose Windows, Microsoft 365, Azure, identity services, and developer tools form a widely deployed enterprise computing ecosystem. Its security relevance spans endpoint and server software, cloud control planes, authentication, collaboration data, and the update mechanisms used to maintain them.
Security news under this tag commonly concerns vulnerabilities requiring patching, exploits against exposed services, identity or token compromise, and misconfiguration of cloud permissions or authentication policies. Practitioners should verify affected versions and exposure, apply updates or mitigations, enforce multifactor authentication and least privilege, and monitor relevant audit logs. Incidents involving Microsoft-hosted identities or data may require rapid session and credential containment, investigation across cloud and on-premises systems, and assessment of privacy or regulatory obligations.
Microsoft has begun rolling out the beta version of its AI-powered Gaming Copilot to Windows 11 systems for users aged 18 or older, excluding those in mainland China. [...]
Valve has announced that its Steam digital distribution service will drop support for 32-bit versions of Windows starting January 2026. [...]
Microsoft 365's dominance and tight integration makes it a massive target in today's cyber landscape. Its tight integration expands the attack surface and amplifies risk. Learn from Acronis TRU why backup blind spots & lateral movement risks demand stronger defenses. [...]
Microsoft is adding free AI-powered text writing capabilities to Notepad for customers with Copilot+ PCs running Windows 11. [...]
Microsoft reminded customers again this week that Office 2016 and Office 2019 will reach the end of extended support in less than 30 days, on October 14, 2025. [...]
Microsoft and Cloudflare have disrupted a massive Phishing-as-a-Service (PhaaS) operation, known as RaccoonO365, that helped cybercriminals steal thousands of Microsoft 365 credentials. [...]
Microsoft is rolling out Copilot Chat to Word, Excel, PowerPoint, Outlook, and OneNote for paying Microsoft 365 business customers. [...]
Microsoft has announced that the Windows Management Instrumentation Command-line (WMIC) tool will be removed after upgrading to Windows 11 25H2 and later. [...]
Microsoft has reminded administrators again that Exchange 2016 and Exchange 2019 will reach the end of extended support next month and has provided guidance for decommissioning outdated servers. [...]
Next month, Microsoft will begin automatically installing the Microsoft 365 Copilot app on Windows devices that have the Microsoft 365 desktop client apps. [...]
Microsoft has removed a safeguard hold that prevented some users from upgrading their systems to Windows 11 24H2 due to compatibility issues that were causing Bluetooth headsets and speakers to malfunction. [...]
Microsoft has confirmed that the September 2025 Windows security updates are causing connection issues to Server Message Block (SMB) v1 shares. [...]
A newly discovered phishing-as-a-service (PhaaS) platform, named VoidProxy, targets Microsoft 365 and Google accounts, including those protected by third-party single sign-on (SSO) providers such as Okta. [...]