Zimbra
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CISA urges agencies to patch actively exploited Zimbra and SharePoint flaws
CISA issued an advisory on March 18, 2026 urging agencies to patch two actively exploited vulnerabilities in Synacor Zimbra and Microsoft SharePoint. Deadlines and technical details are provided for federal agencies.
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Ukraine agency says Russian-linked hackers used AI to aid cyber attacks in H1 2025
Ukraine’s SSSCIP said Russian-linked hackers increased use of AI in cyber attacks in H1 2025, recording 3,018 incidents and using AI-generated phishing and malware while exploiting webmail flaws and abusing legitimate cloud services.
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Zimbra zero-day reportedly used to target Brazilian military, report says
A stored cross-site scripting flaw in Zimbra Collaboration (CVE-2025-27915) was exploited in attacks that targeted the Brazilian military using malicious ICS calendar files, a StrikeReady Labs report said; Zimbra issued patches in January 2025.
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Critical XSS Vulnerability in Zimbra Collaboration Suite Exploited by Hackers
A critical XSS vulnerability (CVE-2024-27443) has been discovered in Zimbra’s CalendarInvite feature, exploited by the Sednit hacking group. Users are urged to patch their systems urgently.
