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.
A threat actor has been abusing link wrapping services from reputed technology companies to mask malicious links leading to Microsoft 365 phishing pages that collect login credentials. [...]
Our tests have shown there are ways to get around the promised security improvements exclusive Microsoft Recall, the AI app that takes screenshots of what you do on your PC so you can search for it later, has a filter that's supposed to prevent it from screenshotting sensitive info like credit card numbers. But a The Register test shows that it still fails in many cases, creating a potential treasure trove for thieves.…
Spy vs. spy China has accused US intelligence agencies of exploiting a Microsoft Exchange zero-day exploit to steal defense-related data and take over more than 50 devices belonging to a "major Chinese military enterprise" for nearly a year.…
Cybersecurity researchers have detailed a new cluster of activity where threat actors are impersonating enterprises with fake Microsoft OAuth applications to facilitate credential harvesting as part of account takeover attacks
Microsoft has observed Russian state actor Secret Blizzard using an AiTM position to gain initial access, assisted by official domestic intercept systems
The threat actor linked to the exploitation of the recently disclosed security flaws in Microsoft SharePoint Server is using a bespoke command-and-control (C2) framework called AK47 C2 (also spelled ak47c2) in its operations
Microsoft has announced that it will start disabling external workbook links to blocked file types by default between October 2025 and July 2026. [...]
No way this will be abused Microsoft has upgraded Azure AI Speech so that users can rapidly generate a voice replica with just a few seconds of sampled speech.…
Microsoft has expanded its .NET bug bounty program and increased rewards to $40,000 for some .NET and ASP.NET Core vulnerabilities. [...]
Russia spying on foreign embassies? Say it ain't so Russian cyberspies are abusing local internet service providers' networks to target foreign embassies in Moscow and collect intel from diplomats' devices, according to a Microsoft Threat Intelligence warning.…
Microsoft warns that a cyber-espionage group linked to Russia's Federal Security Service (FSB) is targeting diplomatic missions in Moscow using local internet service providers. [...]
Cybersecurity researchers have disclosed details of a new phishing campaign that conceals malicious payloads by abusing link wrapping services from Proofpoint and Intermedia to bypass defenses
Regulators around the globe pay attention as results of 21-month cloud probe published Britain's competition regulator says Microsoft and AWS are using their dominance to harm UK cloud customers and proposes to designate both with strategic market status (SMS) to take action against them.…
Using the API Connections for Azure Logic Apps, a security researcher found unauthenticated users could access sensitive data of other customers.
Proton has launched Proton Authenticator, a free standalone two-factor authentication (2FA) application for Windows, macOS, Linux, Android, and iOS. [...]
Experts argue that password managers are still useful despite Microsoft Authenticator ditching its capabilities
A total of 396 compromised Microsoft SharePoint systems have been identified globally, affecting 145 organizations across 41 countries in the wake of the ToolShell zero-day vulnerability
The National Treasury of South Africa is among the half-dozen known victims in South Africa — along with other nations — of the mass compromise of on-premises Microsoft SharePoint servers.
Brazil-Targeting Malware Exploits Windows UIA to Evade DetectionA banking Trojan long confined to Brazil has become the first known malware to exploit Microsoft's UI Automation framework to extract credentials, signaling a new tactic that may evade conventional detection. Akamai's findings point to a growing trend of attackers using legitimate system features.
The emerging cybercriminal gang, which initially targeted Microsoft Windows systems, is looking to go cross-platform using sophisticated, multithread encryption.