How severe is CVE-2024-45519?

CVE-2024-45519 has a CVSS 3.1 base score of 10 (CRITICAL). EPSS estimates a 99.9% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2024-45519: Synacor Zimbra Collaboration Suite (ZCS) Command

CISA Known Exploited Vulnerabilities

Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2024-10-03

Remediation due

2024-10-24

Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA notes
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://nvd.nist.gov/vuln/detail/CVE-2024-45519

Description

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.

Severity

CVSS 3.1 · CNA10 CRITICAL

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Exploitation Context

as of October 13, 2026

All KEV statistics→

CISA added CVE-2024-45519 to the KEV catalog 1 day after its CVE record was published. The median for entries added in 2024 is 21.5 days.
It is one of 19 Zimbra entries in the CISA KEV catalog, and the only one added in 2024.
Its current EPSS score (99.9%) is higher than that of 92% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
-	-	n/a

References

6 Links

Other references

Record Details

Published

2024-10-02

Last updated

2026-02-03

Assigner (CNA)

mitre

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.