Is CVE-2019-9670 in the CISA KEV catalog?

Yes. CVE-2019-9670 is on the CISA Known Exploited Vulnerabilities list, added 2022-01-10.

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

CVE-2019-9670 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2019-9670?

CVE-2019-9670 has an EPSS score of 99.99% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-9670?

Upgrade zimbra collaboration suite to 8.7.11 or later.

CVE & CISA-KEV Catalog

CVE-2019-9670

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an XML External Entity injection (XXE) vulnerability, as demonstrated by Autodiscover/Autodiscover.xml.

CWE-611XML External Entity (XXE)

How to fix

Remediation Available

zimbra collaboration suiteNVD

Affected:>= 8.7.0, < 8.7.11Fixed in:8.7.11CVE-2019-9670derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.99%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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.

Apply updates per vendor instructions.

Remediation due: 2022-07-10

References

Patch1

bugzilla.zimbra.com

Exploit3

Vendor Advisory1

wiki.zimbra.com

Third-Party Advisory1

rapid7.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-611 (XML External Entity (XXE)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-34102	Critical	9.8	100%	KEV	Fix
CVE-2022-28219	Critical	9.8	97%	-	-
CVE-2024-22024	High	8.3	95%	-	-
CVE-2024-38653	High	7.5	92%	-	-
CVE-2017-12629	Critical	9.8	92%	-	Fix
CVE-2013-6429	Medium	6.8	90%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.