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CVE-2024-45519

CriticalPublished

Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability

Published: Oct 2, 2024
Updated: Feb 3, 2026
Assigning CNA: mitre
Evidence observed: Oct 3, 2024

Primary CVSS

10.0/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS probability estimate

99.9%

High · next 30 days

Percentile: 100.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

The postjournal service in Zimbra Collaboration (ZCS) before 8.8.15 Patch 46, 9 before 9.0.0 Patch 41, 10 before 10.0.9, and 10.1 before 10.1.1 sometimes allows unauthenticated users to execute commands.

Sources

CVE-2024-45519-Zimbra-Real-FixPatch
Zimbra CVE-2024-45519 real fix - Official patch is incomplete
CVE-2024-45519Exploit
SMTP vulnerability scanner and exploit script that checks for CVE-2024-45519 and establishes a reverse shell on vulnerable servers.
CVE-2024-45519PoC
Zimbra CVE-2024-45519

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