VulnerabilityBleeping Computer
8.9 — CRITICAL
Critical Zimbra RCE flaw now actively exploited in attacks
CERT Polska, the Polish Computer Emergency Response Team (CERT), warned that attackers have begun exploiting a critical vulnerability in Zimbra Collaboration Suite (ZCS). [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
Attackers are exploiting a critical Zimbra RCE flaw (CVE-2026-73570) in actively exploited attacks, targeting hundreds of millions of people and organizations worldwide.
⚙️Technical Details
💥Impact Assessment
Severity: critical
Who Is at Risk
hundreds of millions of people and organizations worldwide using Zimbra Collaboration Suite
🛡️Recommended Actions
1Check logs for suspicious activity, such as the Zimbra service restarting on its own.
2Verify SNMP notifications are disabled in ZCS.
3Apply patches to all exposed Zimbra servers with CVE-2026-73570
📦Affected Products
Product Name: Zimbra Collaboration SuiteAffected Version: <=10.1.20
🔐NVD Verified DataVERIFIED
CVE-2026-73570 ↗CVSS 8.9 — HIGH
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:LWeaknesses
CWE-78
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