International alert spotlights Russia-linked attacks on Zimbra webmail
A Kremlin-backed group known as Laundry Bear has been using a zero-click phishing technique to break into Zimbra webmail accounts worldwide, the U.S. and other nations said.
Russian state-aligned hackers have been compromising governmental and commercial organizations throughout the West through zero-click phishing emails, federal agencies in the U.S., U.K., Europe, Australia and New Zealand warned on Thursday.
The campaign, carried out by the advanced persistent threat (APT) group Laundry Bear, targets Zimbra Collaboration Suite’s webmail platform and exploits a vulnerability that was patched in November 2025.
According to the advisory, the hackers carried out “extensive” targeting of Ukrainian entities before training their sights on U.S. and NATO organizations — evidence of “an increasing trend within Russian cyber threat groups to target Ukrainian users first—both as a priority target and as a testbench for malicious cyber techniques before broader global deployment.”
Source: https://therecord.media/zimbra-webmail-zero-click-phishing-russia-laundry-bear
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