SecurityHackers exploited Zimbra flaw as zero-day using iCalendar files Posted on October 5, 2025 by Onsite Computing, Inc. Researchers monitoring for larger .ICS calendar attachments found that a flaw in Zimbra Collaboration Suite (ZCS) was used in zero-day attacks at the beginning of the year. […] Go to Source Author: Bill Toulas Onsite Computing, Inc. ParkMobile pays… $1 each for 2021 data breach that hit 22 million Oracle patches EBS zero-day exploited in Clop data theft attacks