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Russian State-Supported Cyber Actors Conduct Phishing Campaign Targeting Users of Zimbra Collaboration Suite

A group of Russian state-supported cyber actors, known as LAUNDRY BEAR, has been aggressively targeting Western organizations using the Zimbra Collaboration Suite (ZCS) since July 2025, seeking to gather sensitive information for the Russian Federation. The group leverages a novel exploit (CVE-2025-66376) to exfiltrate…

CISA Advisories · Jul 23, 2026 High