SecOps SignalSecurity Intelligence Workspace
Loading collection status
Vulnerabilities/CVE-2019-9621Public Intelligence Dossier
Source: synacor · Limited verification•Last verified: •Collection Degraded
CVE-2019-9621ListedHIGH (raw)CVSS 7.5CWE-918

Zimbra Collaboration Suite before 8.6 patch 13, 8.7.x before 8.7.11 patch 10, and 8.8.x before 8.8.10 patch 7 or 8.8.x before 8.8.11 patch 3 allows SSRF via the ProxyServlet component.

Published: 30 Apr 2019•Last updated: 17 Jun 2026, 08:14 AM IST•Source identifier: cve@mitre.org
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added07 Jul 2025
Due28 Jul 2025
RansomwareUnknown
CVSS score
7.5HIGH (raw)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Metric sourcenvd@nist.gov
EPSS probability
81%0.810
Percentile100th
Weakness type
CWE-918
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

Zimbra Collaboration Suite before 8.6 patch 13, 8.7.x before 8.7.11 patch 10, and 8.8.x before 8.8.10 patch 7 or 8.8.x before 8.8.11 patch 3 allows SSRF via the ProxyServlet component.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; SOC ecosystem technology relevance; HIGH severity; Known exploitation signal from CISA KEV or ransomware metadata; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • synacor zimbra collaboration suite · < 8.6.0; >= 8.7.0 < 8.7.11; >= 8.8.0 < 8.8.9; 8.6.0; 8.7.11; 8.8.9; 8.8.10; 8.8.11 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

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

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

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

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched kev-network-exposure (CVSS AV:N, CISA KEV Listed); ssrf (CWE-918)

Exposure

  1. Identify assets with the exact CVE and confirm the affected product/version against the advisory.Telemetry: DeviceTvmSoftwareVulnerabilities · KEV listing raises urgency, but inventory is needed to establish local exposure. · Rule kev-network-exposure
  2. Identify affected server-side request features and deployed versions.Telemetry: Application inventory · The specific feature must be confirmed from the advisory. · Rule ssrf

Exploitation evidence

  1. Review relevant edge or application access logs for unusual requests around the advisory window.Telemetry: CommonSecurityLog · Log review is a hunting hypothesis; KEV listing alone does not show local exploitation. · Rule kev-network-exposure
Show more (2)

Exploitation evidence

  1. Review unusual outbound connections from the affected service to internal or metadata endpoints.Telemetry: DeviceNetworkEvents · Outbound patterns can support SSRF hunting. · Rule ssrf

Response

  1. Recheck the affected assets after the source-stated mitigation or update is applied.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies local remediation. · Rule kev-network-exposure

CISA KEV Record

Catalog entry
07 Jul 2025
Required action due
28 Jul 2025
Known ransomware use
Unknown

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

Change History & Source Data

— No recorded material change

CNA / source
cve@mitre.org
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:-:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch1:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch10:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch11:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch12:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch2:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch3:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch4:*:*:*:*:*:*, cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch5:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2025-07-07blog.zimbra.comSource recordnvd.nist.govSource recordblog.tint0.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2019-9621
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2019-9621
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2019-9621"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Looking up related community queries…

Loading related intelligence

Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.