CVE-2024-45519
Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability
IN CISA KEV
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.
- Vendor
- Synacor
- Product
- Zimbra Collaboration Suite (ZCS)
- CVSS 3.1
- 9.8 (critical), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1
- 10 (critical), scored by cve@mitre.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CWE
- CWE-78
- Published
- 2024-10-02
- NVD modified
- 2026-06-17
- NVD status
- Analyzed
CISA KEV
- Date added
- 2024-10-03
- Due date
- 2024-10-24
- Ransomware use
- Unknown
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- wiki.zimbra.com (Release Notes)
- wiki.zimbra.com (Release Notes)
- wiki.zimbra.com (Release Notes)
- wiki.zimbra.com (Release Notes)
- wiki.zimbra.com (Release Notes)
- wiki.zimbra.com (Not Applicable)
- www.cisa.gov (US Government Resource)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.