Is CVE-2025-68645 actively exploited?

Yes. CVE-2025-68645 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2025-68645 be exploited remotely?

Yes. CVE-2025-68645 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-68645?

CVE-2025-68645 has a CVSS score of 8.8 (HIGH) and an EPSS exploitation probability of 22.92%.

HOME VULNERABILITIESCVE-2025-68645

HIGHCISA KEVIN THE WILD

CVE-2025-68645

Published: January 22, 2026

8.8

CVSS v3.1

EPSS:22.92%probability of exploitation in 30 daysPercentile:95.8th

Official 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.

NVD Source

CISA KEV Advisory

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

Added to KEV: 2026-01-22Federal patch deadline: 2026-02-12

Required Action (CISA)

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

Risk Analysis

This vulnerability in Synacor Zimbra Collaboration Suite (ZCS) allows remote attackers to include arbitrary files from the web root due to a PHP remote file inclusion flaw. With a CVSS score of 8.8 and a high EPSS score, this vulnerability presents a significant risk. Its inclusion in the KEV catalog confirms it has been actively exploited.

This vulnerability is actively being exploited in the wild. The attack vector is network-based with low complexity, making it remotely exploitable.

Recommended Action

It is critical to apply the latest security patches for Synacor Zimbra Collaboration Suite (ZCS) immediately. Additionally, ensure proper input validation and restrict file inclusion capabilities where possible.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-68645 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CISA has added CVE-2025-68645 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.