Is CVE-2019-9670 actively exploited?

Yes. CVE-2019-9670 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2019-9670 be exploited remotely?

The attack vector of CVE-2019-9670 has not been classified yet.

What is the CVSS score of CVE-2019-9670?

CVE-2019-9670 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2019-9670

HIGHCISA KEVIN THE WILD

CVE-2019-9670

Published: January 10, 2022

EPSS:94.43%probability of exploitation in 30 daysPercentile:100.0th

Official Description

Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.

NVD Source

CISA KEV Advisory

Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference

Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.

Added to KEV: 2022-01-10Federal patch deadline: 2022-07-10

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Synacor Zimbra Collaboration Suite (ZCS) is vulnerable to an XML External Entity (XXE) flaw in its mailboxd component. This high-severity issue, coupled with its high EPSS score and confirmed exploitation, presents a significant risk. An attacker could potentially read arbitrary files, perform server-side request forgery, or trigger denial-of-service attacks.

This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog, confirming its use by threat actors. The XXE flaw can be triggered remotely through crafted XML input.

Recommended Action

Administrators should apply the latest security updates for Synacor Zimbra Collaboration Suite (ZCS) to patch the mailboxd component. Additionally, ensure proper input validation and disable external entity processing where not strictly necessary.

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-2019-9670 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2019-9670 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.