SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2024-45519

Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability

KEVCRITICAL 9.8EPSS 99.9%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 24 October 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

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.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
99.91% probability · 100th percentile
Public exploits
None in Exploit-DB
CISA KEV
Listed 3 October 2024 · due 24 October 2024
Weakness
CWE-78
Affected
synacor/zimbra collaboration suite
Source
cve@mitre.org
EPSS trend
0%50%100%30 October 2026: 99.91%30 October 202630 October 2026

EPSS 99.9% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://nvd.nist.gov/vuln/detail/CVE-2024-45519

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.