CASCACascade Atlas

Evidence dossier

CVE-2019-8506

A type confusion issue was addressed with improved memory handling.

Exploited in the wild (CISA KEV since May 4, 2022). NVD reports CVSS 3.1 8.8. EPSS estimates 18.1% exploit likelihood as of Aug 27, 2026.

77.3–80.1Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

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.

State
PUBLISHED
Published
Dec 18, 2019
Updated
Oct 21, 2025
Evidence coverage
94%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateSource date omittedFirst observed by CASCA
    apple

    Record text: 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.

    Inspect raw assertion
    Field
    container
    Value
    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.
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Apple Multiple Products Type Confusion Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Apple Multiple Products Type Confusion Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 18.11% probability · 96.98th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.181080000000; percentile 0.969780000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date May 4, 2022 · first observed Jul 19, 2026

Exploit likelihood18.11%

FIRST EPSS · score date Aug 27, 2026 · 97th percentile · first observed Aug 27, 2026

SeverityCVSS 8.8

NVD · CVSS 3.1 · first observed Jul 19, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Aug 27, 2026
Resolution
Resolve identity

Source comparison

Who said what

appleOriginal assertion
Record text

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.

Inspect raw assertion
Field
container
Value
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.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Apple Multiple Products Type Confusion Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Apple Multiple Products Type Confusion Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

18.11% probability · 96.98th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.181080000000; percentile 0.969780000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
9Underlying assertions
9Canonical products
9Target assertions
0Constraint assertions

Grouped from 2 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

15 scope groups

apple · source assertedAppleiCloud for WindowsDirect source scope
Affected: unspecified to before iCloud for Windows 7.11 (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "unspecified", "lessThan": "iCloud for Windows 7.11", "versionType": "custom"}]
apple · source assertedAppleiOSDirect source scope
Affected: unspecified to before iOS 12.2 (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "unspecified", "lessThan": "iOS 12.2", "versionType": "custom"}]
apple · source assertedAppleiTunes for WindowsDirect source scope
Affected: unspecified to before iTunes 12.9.4 for Windows (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "unspecified", "lessThan": "iTunes 12.9.4 for Windows", "versionType": "custom"}]
apple · source assertedAppleSafariDirect source scope
Affected: unspecified to before Safari 12.1 (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "unspecified", "lessThan": "Safari 12.1", "versionType": "custom"}]
apple · source assertedAppletvOSDirect source scope
Affected: unspecified to before tvOS 12.2 (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "unspecified", "lessThan": "tvOS 12.2", "versionType": "custom"}]
apple · source assertedApplewatchOSDirect source scope
Affected: unspecified to before watchOS 5.2 (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "unspecified", "lessThan": "watchOS 5.2", "versionType": "custom"}]
NVD CPE · APPLICATIONappleicloudVulnerable target · 1 assertions
Any version (unconstrained) (< 7.11)Canonical identity product-81c75e859327e9e508655d01426cbecbe875fdbfac1c3c4ba491e5d9bf38003fLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 7.11
    Match ID
    0b7b3a93-ff67-4aa7-8177-3a2f43ba63be
NVD CPE · OPERATING SYSTEMappleiphone_osVulnerable target · 1 assertions
Any version (unconstrained) (< 12.2)Canonical identity product-665d7155d02581979844685e7fca6c2680af997f9200af455887b1c71c483272Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    through excluding 12.2
    Match ID
    1531e802-5419-4b38-8c0c-bdcbc272648f
NVD CPE · APPLICATIONappleitunesVulnerable target · 1 assertions
Any version (unconstrained) (< 12.9.4)Canonical identity product-9c29a151f354655abc7b3983d75597451b3373bcdcb4cc9b2230220e7a228b81Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    through excluding 12.9.4
    Match ID
    a87496c6-1f96-4a50-855b-a9dcc6ea9dfc
NVD CPE · APPLICATIONapplesafariVulnerable target · 1 assertions
Any version (unconstrained) (< 12.1)Canonical identity product-3c7772db507b09c802755f0f7a9c9fce988300ebb3425947843e4ccbcfe8ffedLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    through excluding 12.1
    Match ID
    7a4d2f39-acfd-4ab1-9437-71192a56aecb
NVD CPE · OPERATING SYSTEMappletvosVulnerable target · 1 assertions
Any version (unconstrained) (< 12.2)Canonical identity product-e5ea88731ef28ba75a5b40a72b650d8199d1f49ce8c4cd688de7cdb41dc8b9fbLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    through excluding 12.2
    Match ID
    98912716-69f2-4372-98f0-bd6cca9aaeb9
NVD CPE · OPERATING SYSTEMapplewatchosVulnerable target · 1 assertions
Any version (unconstrained) (< 5.2)Canonical identity product-1b28e85eba5cb27cd93d563b4ea63a555b916484cee543c65fdbe57d529fc0d1Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    through excluding 5.2
    Match ID
    8962a4fe-ae67-421e-9635-b03e2ebcdf19
NVD CPE · OPERATING SYSTEMredhatenterprise_linux_desktopVulnerable target · 1 assertions
Version 7.0Canonical identity product-ebce605e64c58caa7df6a30e91702332cd8c0be8f801e44353e6350e913ec5aeLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    33c068a4-3780-4eab-a937-6082df847564
NVD CPE · OPERATING SYSTEMredhatenterprise_linux_serverVulnerable target · 1 assertions
Version 7.0Canonical identity product-8db20157ede2f731f576213a7e555a24d2424bb17aed8e43ad9b77c3587f9deaLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    51ef4996-72f4-4fa4-814f-f5991e7a8318
NVD CPE · OPERATING SYSTEMredhatenterprise_linux_workstationVulnerable target · 1 assertions
Version 7.0Canonical identity product-b2aa744c9fb2b4ef0e3b842acbf37879ad4ac43af291292cfb0906170b204ab9Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    825ece2d-e232-46e0-a047-074b34db1e97

Affected-product evidence

Accepted scope and product mapping

9 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-d6ed6f1e35de2e16a8a10f2ae364dab009bb2afadd609071b20da24d60ce2829 · product-1b28e85eba5cb27cd93d563b4ea63a555b916484cee543c65fdbe57d529fc0d1

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
a364286b-a63c-4313-bab6-88bde76ac7d8
Mapping establishedEvidence supported

vendor-d6ed6f1e35de2e16a8a10f2ae364dab009bb2afadd609071b20da24d60ce2829 · product-3c7772db507b09c802755f0f7a9c9fce988300ebb3425947843e4ccbcfe8ffed

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
5fef1159-0cb3-47c4-af75-baca57cf0dac
Mapping establishedEvidence supported

vendor-d6ed6f1e35de2e16a8a10f2ae364dab009bb2afadd609071b20da24d60ce2829 · product-665d7155d02581979844685e7fca6c2680af997f9200af455887b1c71c483272

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
c7595bc2-df0a-4230-9b63-0dc2ce77f9db
Mapping establishedEvidence supported

vendor-d6ed6f1e35de2e16a8a10f2ae364dab009bb2afadd609071b20da24d60ce2829 · product-81c75e859327e9e508655d01426cbecbe875fdbfac1c3c4ba491e5d9bf38003f

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
593ff5ae-541a-4547-9195-ff8f2fd2dd29
Mapping establishedEvidence supported

vendor-c759fafc60d6abc1277ecbf1ee6294d1f25ae0a4c7d5d0d9355c414b2db182cc · product-8db20157ede2f731f576213a7e555a24d2424bb17aed8e43ad9b77c3587f9dea

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
7160f1ec-1a4e-4397-b682-dcd54c5fe1b6
Mapping establishedEvidence supported

vendor-d6ed6f1e35de2e16a8a10f2ae364dab009bb2afadd609071b20da24d60ce2829 · product-9c29a151f354655abc7b3983d75597451b3373bcdcb4cc9b2230220e7a228b81

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
069280bc-01c5-4a06-a177-b067c14b6e85
Mapping establishedEvidence supported

vendor-c759fafc60d6abc1277ecbf1ee6294d1f25ae0a4c7d5d0d9355c414b2db182cc · product-b2aa744c9fb2b4ef0e3b842acbf37879ad4ac43af291292cfb0906170b204ab9

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
2a5222ba-8dc1-4a6a-8962-632f34db6b96
Mapping establishedEvidence supported

vendor-d6ed6f1e35de2e16a8a10f2ae364dab009bb2afadd609071b20da24d60ce2829 · product-e5ea88731ef28ba75a5b40a72b650d8199d1f49ce8c4cd688de7cdb41dc8b9fb

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
c90861b4-8a2a-4af0-b578-ee33ee231a1f
Mapping establishedEvidence supported

vendor-c759fafc60d6abc1277ecbf1ee6294d1f25ae0a4c7d5d0d9355c414b2db182cc · product-ebce605e64c58caa7df6a30e91702332cd8c0be8f801e44353e6350e913ec5ae

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
4634e18c-272d-412d-9b27-0ad79b28bb7c
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
6
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
0c936f70-8d29-4690-8ed9-7981fde343c33a38564d-bb9a-4043-b280-4ce9e579a0c1627d91b0-f63a-4d73-9cf4-ff0b94899392654e3cd0-21c2-44c0-99cc-c194839db46ff7bb2763-ebf1-4e4c-8919-8f3d8e424b22ff690e92-c662-4694-b030-5c51a0de6a3a

Assessments

CVSS by origin

8.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.3
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:M/Au:N/C:C/I:C/A:C
8.8
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8
CISA-ADPCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

8.8Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
8.8
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.