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 confirmed that the KB5074109 January Windows 11 security update causes the classic Outlook desktop client to freeze and hang for users with POP email accounts. [...]
Microsoft has confirmed a new issue that prevents Windows 11 23H2 devices with System Guard Secure Launch enabled from shutting down. [...]
Microsoft announced that the Copilot Studio extension for the Visual Studio Code (VS Code) integrated development environment is now available to all users. [...]
Microsoft announced on Wednesday that it disrupted RedVDS, a massive cybercrime platform linked to at least $40 million in reported losses in the United States alone since March 2025. [...]
Microsoft has resolved a known issue that was causing security applications to incorrectly flag a core Windows component, the company said in a service alert posted this week. [...]
ConsentFix is an OAuth phishing technique abusing browser-based authorization flows to hijack Microsoft accounts. Push Security shares new insights from continued tracking, community research, and evolving attacker techniques. [...]
Researchers identified an attack method dubbed "Reprompt" that could allow attackers to infiltrate a user's Microsoft Copilot session and issue commands to exfiltrate sensitive data. [...]
Cloud marketplace and distributor Pax8 has confirmed that it mistakenly sent an email to fewer than 40 UK-based partners containing a spreadsheet with internal business information, including MSP customer and Microsoft licensing data. [...]
Microsoft confirmed that a recent Windows 365 update is blocking customers from accessing their Microsoft 365 Cloud PC sessions. [...]
Microsoft has started rolling out new Secure Boot certificates that will automatically install on eligible Windows 11 24H2 and 25H2 systems. [...]
Microsoft has released the KB5073724 extended security update to fix the Patch Tuesday security updates, including 3 zero-days and a fix for expiring Secure Boot certificates. [...]
Microsoft has released Windows 11 KB5074109 and KB5073455 cumulative updates for versions 25H2/24H2 and 23H2 to fix security vulnerabilities, bugs, and add new features. [...]
Today is Microsoft's January 2026 Patch Tuesday with security updates for 114 flaws, including one actively exploited and two publicly disclosed zero-day vulnerabilities. [...]
Microsoft has started retiring the Microsoft Lens PDF scanner app for Android and iOS devices on Friday, January 9th, with plans to remove it from app stores next month. [...]
Microsoft 365 has made file sharing effortless, but that convenience often leaves organizations with little visibility into who can access sensitive data. Tenfold explains how access reviews for shared cloud content can help organizations regain visibility, reduce unnecessary permissions, and prevent data leaks in Microsoft 365. [...]