tech ๐จ Hackers breached 270+ Zimbra servers via zero-day flaw
Threat actors exploited a high-severity Zimbra Collaboration Suite vulnerability to compromise over 270 instances. This attack targeted Zimbra servers used by numerous global organizations and government agencies. Shadowserver reported seeing 274 compromised instances as of August 22, 2026. Synacor patched the flaw, CVE-2026-73570, with ZCS version 10.1.20 on July 20. CISA ordered U.S. FCEB agencies to patch their systems by August 24.