# CVE-2024-45519 — Synacor Zimbra Collaboration Suite

**CISA KEV**

> As of 2026-02-03, CVE-2024-45519 is a CRITICAL-severity vulnerability in Synacor Zimbra Collaboration Suite, CVSS v3.1 10, EPSS 99.9% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-10-03), with a US federal remediation deadline of 2024-10-24. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2024-45519, most recently “Zimbra Collaboration Suite 10.1.20 Patches Critical Unauthenticated SNMP/Swatchdog Command Injection Plus Six Additional CVEs”.

**Last updated:** 2026-02-03

## What is CVE-2024-45519?

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.

The record classifies CVE-2024-45519 under weakness class [CWE-78](https://intel.threadlinqs.com/cwe/CWE-78). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 30 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 740 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 10 — CRITICAL (`CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N`)
- **EPSS (FIRST):** 99.9% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
- **CISA KEV:** Listed since 2024-10-03, federal remediation deadline 2024-10-24
- **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- **Published:** 2024-10-02, last modified 2026-02-03

## Is CVE-2024-45519 being exploited?

CISA added CVE-2024-45519 to the Known Exploited Vulnerabilities catalog on 2024-10-03, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2024-10-24 under BOD 22-01. Weaponised exploit code for CVE-2024-45519 is publicly available. 5 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (`javascript/cves/2024/CVE-2024-45519.yaml`). It currently carries a trending score of 50 in the Threadlinqs vulnerability feed.

- [Chocapikk/CVE-2024-45519](https://github.com/Chocapikk/CVE-2024-45519) (github)
- [p33d/CVE-2024-45519](https://github.com/p33d/CVE-2024-45519) (github)
- [sec13b/CVE-2024-45519](https://github.com/sec13b/CVE-2024-45519) (github)
- [lionels-cyber/CVE-2024-45519-Zimbra-Real-Fix](https://github.com/lionels-cyber/CVE-2024-45519-Zimbra-Real-Fix) (github)
- [trickest/cve](https://github.com/trickest/cve/blob/main/2024/CVE-2024-45519.md) (trickest)

## Affected products and versions

- [Synacor](https://intel.threadlinqs.com/vendors/synacor): Zimbra Collaboration Suite, Zimbra Collaboration Suite 8.8.15

_Showing 2 of 30 recorded product entries._

## How to fix CVE-2024-45519

Because CVE-2024-45519 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2024-10-24. No vendor patch reference has been recorded for CVE-2024-45519 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2024-45519

1 tracked threat in the Threadlinqs corpus references CVE-2024-45519, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Zimbra Collaboration Suite 10.1.20 Patches Critical Unauthenticated SNMP/Swatchdog Command Injection Plus Six Additional CVEs](https://intel.threadlinqs.com/threat/TL-2026-1586) — CRITICAL · 2026-07-21

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [wiki.zimbra.com](https://wiki.zimbra.com/wiki/Security_Center)
- [wiki.zimbra.com (Zimbra Responsible Disclosure Policy)](https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy)
- [wiki.zimbra.com (10.1)](https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes)
- [wiki.zimbra.com (10.0)](https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.9#Security_Fixes)
- [wiki.zimbra.com (P41)](https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P41#Security_Fixes)

_Showing 5 of 6 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2024-45519
Full detection coverage and IOCs for threats exploiting CVE-2024-45519 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp