Microsoft software and cloud platforms underpin enterprise systems, so vulnerabilities and security advisories can affect identity, data, and operations.
Search across headline titles and summaries.
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 resolved a known issue causing significant delays for Microsoft 365 customers when saving attachments in Outlook Desktop. [...]
Microsoft warns that the BlueNoroff North Korean hacking group is setting up new attack infrastructure for upcoming social engineering campaigns on LinkedIn. [...]
Microsoft provides three more years of Windows Server 2012 Extended Security Updates (ESUs) until October 2026, allowing administrators more time to upgrade or migrate to Azure. [...]
Microsoft publicly acknowledged a known issue causing Windows Server 2022 virtual machine (VM) blue screens and boot failures on VMware ESXi hosts. [...]
A threat actor has been abusing Google Ads to distribute a trojanized version of the CPU-Z tool to deliver the Redline info-stealing malware. [...]
Threat actors are exploiting a zero-day vulnerability in the service management software SysAid to gain access to corporate servers for data theft and to deploy Clop ransomware. [...]
Windows 11 will no longer add SMB1 Windows Defender Firewall rules when creating new SMB shares starting with today's Canary Channel Insider Preview Build 25992 build. [...]
Microsoft has recently removed from its store a fraudulent Ledger Live app for cryptocurrency management after multiple users lost at least $768,000 worth of cryptocurrency assets. [...]
In a Monday advisory, Microsoft warned Outlook.com users about issues they might encounter when sending emails containing attachments. [...]
Microsoft has introduced a new protective feature in the Authenticator app to block notifications that appear suspicious based on specific checks performed during the account login stage. [...]
Microsoft will roll out Conditional Access policies requiring multifactor authentication from administrators when signing into Microsoft admin portals such as Microsoft Entra, Microsoft 365, Exchange, and Azure. [...]