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A significant gap in Microsoft Teams’ B2B guest access allows attackers to bypass Defender for Office 365 protections, creating unprotected zones for phishing and malware delivery. At Cybersecurity News, we recently highlighted how Microsoft Teams’ New “Chat with Anyone” Feature Exposes Users to Phishing and Malware Attacks. This architectural issue, highlighted by Ontinue, stems from […] The post Microsoft Teams Guest Chat Vulnerability Exposes Users to Malware Attack appeared first on Cyber Security News.
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Microsoft Teams is set to launch a key update for its Windows desktop client, introducing a new child process, ms-teams_modulehost.exe, to boost the performance of calling features and reduce startup times. This change separates the calling stack from …
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Microsoft has announced a significant update to the Teams Desktop Client for Windows that aims to enhance performance and reduce startup times for calling features. The update, detailed in the Message Center notification MC1189656 published on November 25, 2025, introduces a new process architecture designed to optimize resource usage and improve meeting experiences. New Process […] The post Microsoft Teams Introduces New Feature to Boost Performance and Startup Speed appeared first on Cyber Security News.
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Microsoft is sounding the alarm on critical security considerations as it introduces agentic AI capabilities to Windows through experimental features like Copilot Actions. The company is rolling out a new agent workspace feature in private preview that…
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A critical remote code execution (RCE) vulnerability in Microsoft’s Update Health Tools (KB4023057). A widely deployed Windows component designed to expedite security updates through Intune. The flaw stems from the tool connecting to dropped Azure Blob storage accounts that attackers could register and control. How the Vulnerability Works The vulnerability exists in version 1.0 of the Update […] The post Microsoft’s Update Health Tools Configuration Vulnerability Let Attackers Execute Arbitrary Code Remotely appeared first on Cyber Security News.
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A sophisticated phishing campaign is currently exploiting a subtle typographical illusion to deceive users into surrendering sensitive login credentials. Cybercriminals have registered the domain “rnicrosoft.com,” strategically replacing th…
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Tycoon2FA, a sophisticated phishing-as-a-service platform tracked by Microsoft as Storm-1747, has emerged as the dominant threat targeting Office 365 accounts throughout 2025. The cybercriminal operation has launched an aggressive campaign involving ne…
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Microsoft has launched an investigation into a widespread issue affecting Microsoft Copilot in Microsoft 365, where users are experiencing significant limitations when performing actions on files. The technology giant confirmed the incident via official Microsoft 365 Status channels, assigning the tracking identifier CP1188020 for administrative reference. The Issue and Impact The reported problem prevents users […] The post Microsoft Investigating Copilot Issue On Processing Files appeared first on Cyber Security News.
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Microsoft is introducing a new capability in Teams that allows users to report messages they believe were mistakenly flagged as security threats. The feature represents a significant step toward improving detection accuracy and reducing false positives across organizations worldwide. Completion of availability is expected by the end of November 2025. The reporting feature enables users […] The post Microsoft Teams New Feature Let Users Report Messages Incorrectly Flagged as Security Threats appeared first on Cyber Security News.
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Microsoft Teams is rolling out a new feature that allows users to misreport messages flagged as security threats. The capability, rolling out by the end of November 2025, targets organizations using Microsoft Defender for Office 365 Plan 2 or Microsoft…
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