Microsoft Copilot Personal is an AI-powered productivity platform integrated with Microsoft 365 that assists with drafting, summarization, and data handling across apps.
Overview
Microsoft Copilot Personal is an AI-powered productivity platform integrated with Microsoft 365 that assists with drafting, summarization, and data handling across apps. The article highlights a security risk where a prompt-exploitation technique named Reprompt can turn Copilot into a data exfiltration tool, creating a new data-leak vector for organizations.
Related Threat Clusters
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CoSnitch Attack Exposes Microsoft Copilot Vulnerabilities
Researchers from Varonis Threat Labs discovered a vulnerability in Microsoft Copilot Personal, dubbed 'CoSnitch,' that allows attackers to execute commands without user confirmation. By manipulating the AI's responses,…
10 articles · Updated August 18, 2026 -
Microsoft Copilot Data Theft via Reprompt Attack Exploit
Researchers revealed a security exploit in Microsoft Copilot that allowed attackers to steal user data through a single malicious link. This 'Reprompt' attack bypassed data leak protections and enabled session…
9 articles · Updated January 15, 2026
Recent Intelligence Reports
- Critical Microsoft Copilot CoSnitch Flaw Lets Hackers Steal Sensitive Data With One Click — Gbhackers · August 19, 2026
- One click is all it takes: How ‘Reprompt’ turned Microsoft Copilot into data exfiltration tools — Csoonline · January 16, 2026