CVE-2024-45519

Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability

Critical 10.0
Exploited: added to CISA KEV 3 Oct 2024

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.

Key facts

Published: 2 Oct 2024
Last changed: 3 Feb 2026
Assigned by: mitre
KEV added: 3 Oct 2024
KEV fix due: 24 Oct 2024
EPSS: 99.907% likely to be exploited in the next 30 days, higher than 99.967% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

10.0CVSS 3.1, Criticalfrom the CNA (mitre)CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N

What to do

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

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
n/a	n/a	n/a (affected)

Timeline

2 Oct 2024 Published
3 Oct 2024 Added to the CISA KEV catalogue

Weakness

CWE-78

Practice this bug class

HackZoneLabs has a hands-on lab on OS command injection (CWE-78).

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