Act
archived
Russian APT Void Blizzard Exploits Patched Zimbra Flaw for Email Theft
- Engineer — Act: CISA warning on active state-sponsored exploitation of a Zimbra zero-click vulnerability means patch status must be confirmed immediately — upgrade Zimbra Collaboration to the patched release and audit server logs for signs of prior compromise.
- SOC/IR — Act: Void Blizzard (Laundry Bear) is actively combining phishing with this Zimbra exploit in live campaigns — hunt for anomalous Zimbra authentication events and email-sync activity tied to this actor since the campaign began, and request any IOCs from the CISA advisory.
- Leader — Act: A CISA-attributed Russian espionage campaign targeting enterprise email warrants confirming this week whether Zimbra is in your environment, verifying engineering has applied the patch, and briefing leadership given the data-theft implications.
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