Security readout for executives and security teams
CVE-2019-9670 is a critical XML External Entity issue in Zimbra Collaboration Suite mailboxd. Unauthenticated network access can expose confidentiality, integrity, and availability. Because CISA lists it in KEV, organizations should treat internet-facing Zimbra 8.7.x systems as urgent until proven patched or retired. Primary exposure is organizations running Zimbra Collaboration Suite 8.7.x before 8.7.11p10, especially mail systems reachable from the internet. The bundle’s structured affected product metadata is incomplete, but the CVE description identifies the impacted Zimbra branch and component. Treat this as a priority incident-prevention item, not routine patching. Internet-facing vulnerable mail infrastructure can become a business-critical compromise path, and KEV status means regulators and attackers both recognize the risk. Mitigation focus: Upgrade affected Zimbra 8.7.x systems to 8.7.11p10 or later per vendor guidance.; Review Zimbra security advisories for supported upgrade and hardening instructions.; Prioritize isolation or retirement for unsupported internet-facing Zimbra 8.7.x deployments..
Michael Williams reviewed this cited source version on .
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Open ATT&CK lookupCVE-2019-9670 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesCVE reference · x_refsource_MISC
- https://bugzilla.zimbra.com/show_bug.cgi?id=109129CVE reference · x_refsource_MISC
- 46693CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://isc.sans.edu/forums/diary/CVE20199670+Zimbra+Collaboration+Suite+XXE+vulnerability/27570/CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9670CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of XML External Entity Reference
Improper Restriction of XML External Entity Reference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.