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Vulnerabilities/CVE-2019-8506Public Intelligence Dossier
Source: apple · Limited verification•Last verified: •Collection Degraded
CVE-2019-8506ListedHIGH (raw)CVSS 9.3CWE-843

A type confusion issue was addressed with improved memory handling

Published: 18 Dec 2019•Last updated: 17 Jun 2026, 08:12 AM IST•Source identifier: product-security@apple.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added04 May 2022
Due25 May 2022
RansomwareUnknown
CVSS score
9.3HIGH (raw)
AV:N/AC:M/Au:N/C:C/I:C/A:C
Metric sourcenvd@nist.gov
EPSS probability
16.2%0.162
Percentile97th
Weakness type
CWE-843
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; Microsoft or Microsoft-managed product relevance; HIGH severity; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

9 source-backed products
Affected products and versions (source)
  • apple icloud · < 7.11 · NVD CPE · Source
  • apple itunes · < 12.9.4 · NVD CPE · Source
  • apple safari · < 12.1 · NVD CPE · Source
  • apple iphone os · < 12.2 · NVD CPE · Source
  • apple tvos · < 12.2 · NVD CPE · Source
  • apple watchos · < 5.2 · NVD CPE · Source
  • redhat enterprise linux desktop · 7.0 · NVD CPE · Source
  • redhat enterprise linux server · 7.0 · NVD CPE · Source
  • redhat enterprise linux workstation · 7.0 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply updates per vendor instructions.

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 updates per vendor instructions.

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)

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

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

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
04 May 2022
Required action due
25 May 2022
Known ransomware use
Unknown

Apply updates per vendor instructions.

Change History & Source Data

— No recorded material change

CNA / source
product-security@apple.com
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*, cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*, cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*, cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*, cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*, cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*, cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*, cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*, cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2022-05-04support.apple.comSource recordnvd.nist.govSource recordsupport.apple.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-2019-8506
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2019-8506
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2019-8506"| 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

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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.