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Russian State-Backed 'LAUNDRY BEAR' Exploits Zimbra Zero-Click Vulnerability

The Russian state-supported threat group LAUNDRY BEAR is exploiting a zero-click vulnerability, dubbed 'beehive,' in the Zimbra Collaboration Suite (ZCS) webmail service, actively stealing sensitive emails and gaining persistent access to compromised networks since July 2025 by merely viewing a malicious email, with Western organizations across various sectors being targeted.

Zimbra Collaboration Suite LAUNDRY BEAR phishing zero-click espionage state-sponsored zimbra email-theft
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