Russian hackers exploit unpatched Zimbra servers to steal emails
Russian state-backed hacker group Laundry Bear has been breaking into government and commercial networks for at least a year by exploiting a vulnerability in the Zimbra Collaboration Suite (ZCS) webmail platform. Laundry Bear (also known as Void Blizzard, CL-STA-1114, and TA488) has been running the campaign since July 2025, according to a joint advisory from the NSA, FBI, CISA, and cybersecurity agencies from the Netherlands, UK, Australia, Canada, and a dozen other countries. “Laundry Bear’s ... More → The post Russian hackers exploit unpatched Zimbra servers to steal emails appeared first on Help Net Security .
Why this byte is shareable
Signal quality
observed
Confidence badge and source context included.
Entity anchor
Policy
Clear company or model context for distribution.
Export ready
1200 x 630 card
Optimized for X, LinkedIn, and chat previews.
Why it matters
Deprecations can break production agents quickly. Teams should audit dependencies and ship migration patches before cutoffs.
Suggested launch post
Use this in X threads, community posts, internal team chats, or launch recaps.
Russian hackers exploit unpatched Zimbra servers to steal emails Why it matters: Deprecations can break production agents quickly. Teams should audit dependencies and ship migration patches before cutoffs. Source: Help Net Security https://a2zai.ai/bytes/russian-hackers-expl...
Permalink: https://a2zai.ai/bytes/russian-hackers-exploit-unpatched-zimbra-servers-to-steal-emails-fa00ace3
Social card: https://a2zai.ai/bytes/russian-hackers-exploit-unpatched-zimbra-servers-to-steal-emails-fa00ace3/opengraph-image