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.
Sophos found observed a significant rise in Microsoft LOLbins abused by attackers in H1 2024 compared to 2023
Microsoft detailed how Russian espionage group Secret Blizzard is leveraging infrastructure of other threat actors to target the Ukrainian military with custom malware
Microsoft MFA flaw exposed that allowed attackers to bypass security within an hour, putting 400m Office 365 accounts at risk
Microsoft has patched dozens of vulnerabilities in December, including one zero-day being exploited in the wild