Exploited Zimbra Flaw Highlights Shrinking Window to Patch
CISA gave US agencies three days to patch actively exploited Zimbra flaw CVE-2026-73570, which allows full takeover of user communications.
CISA set a three-day remediation deadline for federal agencies to patch CVE-2026-73570, a Zimbra vulnerability that enables full takeover of a user's communications. The flaw is being actively exploited, underscoring the shrinking window between disclosure and exploitation. Dark Reading frames the case as evidence defenders must accelerate patch cycles.
- CISA ordered patching within three days
- CVE-2026-73570 allows full takeover of user communications
- Active exploitation shrinks patch windows
- Affects Zimbra email and collaboration deployments
- CVEs
- CVE-2026-73570
- Products
- Zimbra
- Victims
- US federal agencies
- Organizations
- CISA
- Countries
- United States
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-73570 | Unauthenticated OS Command Injection RCE in Synacor Zimbra Collaboration Suite | 8.9 | 77% | KEVPoC ×5 | KEV |
From the original article
CISA issued a three-day deadline for agencies to patch a Zimbra security vulnerability, CVE-2026-73570, which allows full takeover of a user's communications.
By Jai Vijayan · darkreading.com
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