CERT Polska warned on 20 August 2026 that threat actors were actively exploiting a critical remote code execution vulnerability (CVE-2026-73570) in Zimbra Collaboration Suite across multiple systems. Zimbra released patches for nine vulnerabilities, with the RCE flaw posing immediate risk to mail server installations worldwide.
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Critical Zimbra RCE Vulnerability Actively Exploited in the Wild CERT Polska has warned that threat actors are actively exploiting a critical remote code execution vulnerability in Zimbra Collaboration Suite. Tracked as CVE-2026-73570, the flaw allows unauthenticated attackers to run arbitrary operating system commands as the zimbra user on affected servers. The issue is an OS command injection vu
CERT Polska, the Polish Computer Emergency Response Team (CERT), warned that attackers have begun exploiting a critical vulnerability in Zimbra Collaboration Suite (ZCS). [...]
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Zimbra RCE flaw under active attack Polish CERT warns of critical Zimbra Collaboration Suite vulnerability exploitation. https:// hostingpaper.com/article/zimbr a-rce-flaw-under-active-attack # Security # Vulnerabilities
🤖 Critical Zimbra Collaboration Suite RCE flaw is now actively exploited in the wild. CERT Polska warns attackers are targeting a critical ZCS vulnerability — patch mail servers immediately. 🔗 https://www. bleepingcomputer.com/news/secu rity/critical-zimbra-rce-flaw-now-actively-exploited-in-attacks/ # CVE # RCE # CyberSec
Critical Zimbra RCE Vulnerability Exploited in Global Attacks Zimbra patched nine vulnerabilities in its Collaboration Suite, including a critical RCE flaw (CVE-2026-73570) that attackers are currently exploiting to take control of mail servers. Organizations should update to version 10.1.20 and check logs for signs of compromise. **If you run Zimbra Collaboration Suite, update to version 10.1.20
# Poland 's # CERT Warns of Active Exploitation of Critical # Zimbra Collaboration Suite Flaw https:// securityaffairs.com/197610/sec urity/polands-cert-warns-of-active-exploitation-of-critical-zimbra-collaboration-suite-flaw.html # securityaffairs # hacking