CVE-2025-68645

Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability

Synacor Zimbra Collaboration Suite (ZCS)Applications & CMS

CVSS

8.8High

ExploitationExploited in the wildAdded to KEV 22 Jan 2026CISA KEV

Exploit odds (EPSS)48.9%Chance of exploitation activity in the next 30 days, higher than 98% of CVEs. Scored 23 Oct 2026FIRST EPSS

Fixed inNone listedNo source names a fixed version. Check the vendor advisory below

Federal deadline12 Feb 2026Remediation due date for US federal agenciesCISA KEV

CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

22 Dec 2025, 00:00 UTCPublishedCVE List
22 Jan 2026Added to CISA KEVCISA KEV

Public exploit code and templates 1

Scanner templateZimbra Collaboration - Local File InclusionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Synacor Zimbra Collaboration Suite (ZCS) contains a PHP remote file inclusion vulnerability that could allow for remote attackers to craft requests to the /h/rest endpoint to influence internal request dispatching, allowing inclusion of arbitrary files from the WebRoot directory.

Text from CVE List

Affected versions 1

n/aaffected: n/aCVE List