UnscoredCISA KEV

CVE-2019-9670

Synacor — Zimbra Collaboration Suite (ZCS)

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.

CVSSNot scored

EPSS100.0%

Exploit StatusConfirmed (CISA KEV)

PublishedJan 10, 2022

Last ModifiedUndated

VendorSynacor

ProductZimbra Collaboration Suite (ZCS)

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Vulnerability Timeline

PublishedJan 10, 2022

Added to CISA KEVJan 10, 2022

CISA Remediation DueJul 10, 2022

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More from Synacor in the catalogue.

CVE-2025-48700Zimbra Collaboration Suite (ZCS)Published Apr 20, 2026 CVE-2025-66376Zimbra Collaboration Suite (ZCS)Published Mar 18, 2026 CVE-2020-7796Zimbra Collaboration SuitePublished Feb 17, 2026

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