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Fake Calendar Invites Target 40,000 Firms in Microsoft Credential Theft

Summary by cybernoz.com
More than 40,000 organisations have received fake calendar invitations designed to steal Microsoft account credentials, according to new findings from Check Point Email researchers. Cybersecurity researchers at Check Point revealed that their detection system identified 302,386 unique phishing emails after activity spiked on September 25, 2026. The messages came from 247,270 sender addresses using 33,890
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Check Point security researchers have identified several large-scale phishing campaigns that misuse fake calendar invitations to steal login data. Some are sent as .ics attachments. As the file is valid calendar data, the attack uses calendar functions and user confidence without exploiting a software security vulnerability. Others use a link that seems to lead to a different target. Both methods (...) Special reports / affiche

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Check Point counts over 302,000 phishing emails with fake appointment invitations to more than 40,000 organizations. The goal is Microsoft access data.

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IT Security News - cybersecurity, infosecurity news broke the news on Monday, October 19, 2026.
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