CVE-2024-45519: Synacor Zimbra Collaboration Suite (ZCS) · OS Command Injection
Affects Synacor Zimbra Collaboration Suite (ZCS)Source CVE Database V5
Exploited in the wild · KEV due 24 Oct 2024 · public detection template (Nuclei) · 99% EPSS : upgrade to 10.1.1 or 10.0.9 now.
Data as of 26 Oct 2026, 17:16 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
- EPSS
- 99.9% chance of exploitation in 30 days – higher than 99% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 10.1.1, 10.0.9
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 2 Oct 2024
Detectable: evidence found.
nuclei template: Zimbra Collaboration Suite < 9.0.0 - Remote Code Execution
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 1 day after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by MITRE Corporation
, 31 days before disclosure
CVE published
on cve.org
, t = 0
Added to CISA KEV (opens in a new tab)
exploitation confirmed
, 1 day after disclosure
KEV remediation due
US federal deadline
, 22 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Synacor Zimbra Collaboration Suite (ZCS) to 10.1.1 or 10.0.9.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Synacor Zimbra Collaboration Suite (ZCS) | Affected
| Fixed in
|
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.
References
- wiki.zimbra.com/wiki/Security_Center (opens in a new tab)
- wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy (opens in a new tab)
- wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1 (opens in a new tab)
- wiki.zimbra.com/wiki/Zimbra_Releases/10.0.9 (opens in a new tab)
- wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P41 (opens in a new tab)
- wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P46 (opens in a new tab)
- blog.projectdiscovery.io/zimbra-remote-code-execution/ (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-45519 (opens in a new tab)