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PatchSiren cyber security CVE debrief

CVE-2024-45519 Synacor CVE debrief

CVE-2024-45519 is a Synacor Zimbra Collaboration Suite (ZCS) command execution vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2024-10-03. Because it is listed as known exploited, organizations running ZCS should prioritize remediation using vendor guidance and treat exposed deployments as urgent.

Vendor
Synacor
Product
Zimbra Collaboration Suite (ZCS)
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2024-10-03
Original CVE updated
2024-10-03
Advisory published
2024-10-03
Advisory updated
2024-10-03

Who should care

Zimbra Collaboration Suite (ZCS) administrators, email platform owners, security operations teams, vulnerability management teams, and anyone responsible for internet-facing or externally reachable ZCS instances.

Technical summary

The available source corpus identifies CVE-2024-45519 as a command execution vulnerability in Synacor Zimbra Collaboration Suite (ZCS). CISA’s KEV entry indicates the issue is known to be exploited in the wild, but the supplied corpus does not include affected version ranges, attack prerequisites, or a vendor patch bulletin, so those details are intentionally omitted here.

Defensive priority

Urgent. CISA classified this as a Known Exploited Vulnerability and set a remediation due date of 2024-10-24. Prioritize patching or vendor-directed mitigation on the next available change window, especially for any exposed ZCS deployments.

Recommended defensive actions

  • Review the official Zimbra security advisories and apply the vendor-recommended mitigation or update as soon as available.
  • If a mitigation is not available, follow CISA guidance and discontinue use of the product until a safe path to remediation exists.
  • Inventory all Zimbra Collaboration Suite (ZCS) instances, including shadow IT and externally reachable systems, so no deployment is missed.
  • Increase monitoring for suspicious administrative activity, unexpected command execution, and unusual mail-server behavior while remediation is in progress.
  • Validate that compensating controls such as network restrictions and access controls are in place for any instance that cannot be immediately remediated.

Evidence notes

This debrief is based only on the supplied CISA KEV metadata and the official CVE/NVD/CISA links provided in the corpus. The corpus identifies the issue as a command execution vulnerability in Synacor Zimbra Collaboration Suite (ZCS), lists it as a known exploited vulnerability, and provides the CISA due date of 2024-10-24. No vendor advisory text, affected versions, or CVSS data were supplied here, so those details are not asserted.

Official resources

Public vulnerability identifier published on 2024-10-03. The supplied corpus shows the same date for both CVE publication and CISA KEV entry creation; no earlier disclosure date is asserted here.