CVE-2025-27915

Pierluigi Paganini October 06, 2025
Zimbra users targeted in zero-day exploit using iCalendar attachments

Threat actors exploited a Zimbra zero-day via malicious iCalendar (.ICS) files used to deliver attacks through calendar attachments. StrikeReady researchers discovered that threat actors exploited the vulnerability CVE-2025-27915 in Zimbra Collaboration Suite in zero-day attacks using malicious iCalendar (.ICS) files. These files, used to share calendar data, were weaponized to deliver JavaScript payloads to targeted […]