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 Teams is experiencing issues, with thousands reporting problems sending messages, including delays. [...]
The Nigerian police have arrested three individuals linked to targeted Microsoft 365 cyberattacks via Raccoon0365 phishing-as-a-service. [...]
Multiple threat actors are compromising Microsoft 365 accounts in phishing attacks that leverage the OAuth device code authorization mechanism. [...]
This month's extended security update for Windows 11 broke Message Queuing (MSMQ), which is typically used by enterprises to manage background tasks. [...]
Microsoft has confirmed that recent Windows updates trigger RemoteApp connection failures on Windows 11 24H2/25H2 and Windows Server 2025 devices in Azure Virtual Desktop environments. [...]
Microsoft has asked businesses to reach out for advice on how to temporarily mitigate a Message Queuing (MSMQ) issue causing enterprise apps and Internet Information Services (IIS) sites to fail. [...]
Microsoft announced on Monday that it will soon block mobile devices running outdated email software from accessing Exchange Online services until they're updated. [...]
Microsoft says that recent Windows 11 security updates are causing VPN networking failures for enterprise users running Windows Subsystem for Linux. [...]
Microsoft has confirmed that the December 2025 security updates are breaking Message Queuing (MSMQ) functionality, affecting enterprise applications and Internet Information Services (IIS) websites. [...]