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 is showing ads for Microsoft 365 Family subscriptions to its Office 2021 customers, offering them discounts of over $28 to get a 3-month Family plan subscription. [...]
Some signed third-party bootloaders for the Unified Extensible Firmware Interface (UEFI) used by Windows could allow attackers to execute unauthorized code in an early stage of the boot process, before the operating system loads. [...]
Microsoft is investigating customer reports of a known issue causing Outlook for Microsoft 365 to freeze and crash right after opening. [...]
Developers are furious at GitHub's upcoming privacy policy changes that would allow GitHub to place tracking cookies on some of its subdomains. The Microsoft subsidiary announced this month, it would be adding "non-essential cookies" on some marketing web pages starting in September, and offered a 30-day "comment period." [...]
A new large-scale phishing campaign targeting Coinbase, MetaMask, Kraken, and Gemini users is abusing Google Sites and Microsoft Azure Web App to create fraudulent sites. [...]
An ongoing outage affects multiple Microsoft 365 services, blocking users from connecting to Exchange Online, Microsoft Teams, Outlook desktop clients, and OneDrive for Business. [...]
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two more flaws to its catalog of Known Exploited Vulnerabilities, based on evidence of active exploitation. [...]
Microsoft says that some of the Exchange Server flaws addressed as part of the August 2022 Patch Tuesday also require admins to manually enable Extended Protection on affected servers to fully block attacks. [...]
Microsoft has released security updates to address a high severity Windows zero-day vulnerability with publicly available exploit code and abused in attacks. [...]
Microsoft has released the Windows 11 KB5016629 cumulative update with security updates, improvements, including fixes for File Explorer and the Start Menu and a new Focus Assist feature. [...]
Today is Microsoft's August 2022 Patch Tuesday, and with it comes fixes for the actively exploited 'DogWalk' zero-day vulnerability and a total of 121 flaws. [...]
Microsoft has released the Windows 10 KB5016616 and KB5016623 cumulative updates for versions 21H2, version 21H1, version 20H2, and 1809 to fix security vulnerabilities and resolve bugs and performance issues. [...]
Microsoft has warned today that Windows devices with the newest supported processors are susceptible to data damage on Windows 11 and Windows Server 2022. [...]
An extensive series of attacks detected in January used new Windows malware to backdoor government entities and organizations in the defense industry from several countries in Eastern Europe. [...]
Attackers abused open redirects on the websites of Snapchat and American Express in a series of phishing attacks to steal Microsoft 365 credentials. [...]