# CASCA evidence receipt — CVE-2018-4878

- Generation: `gen-409cbd0c74ff4feb70e4944e6b98ce40`
- As known: 2026-07-21T08:13:17.697275+00:00
- Comparison: gen-56ccdaf914f7b4be95b689ccae7dc20d
- Score policy: public-priority-v1.0.1
- Conflict: not observed in this generation

## Source assertions

- **adobe** (original_assertion): container — A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player handling of listener objects. A successful attack can lead to arbitrary code execution. This was exploited in the wild in January and February 2018.
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2018-4878
- **CISA-ADP** (independent_enrichment): container — CISA ADP Vulnrichment
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2018-4878
- **CVE** (derivative_copy): container — CVE Program Container
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2018-4878
- **CISA KEV** (original_assertion): observed_exploitation — Adobe Flash Player Use-After-Free Vulnerability
  - Observed: 2026-07-19T04:54:04.25158+00:00
  - Citation: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- **FIRST EPSS** (original_assertion): model_probability — Probability 0.895320000000; percentile 0.997710000000
  - Observed: 2026-07-19T04:54:35.756809+00:00
  - Citation: https://www.first.org/epss/data_stats.html

## CVSS assessments

- **nvd@nist.gov** (Primary, CVSS 3.1): 7.8 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **nvd@nist.gov** (Primary, CVSS 2.0): 7.5 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `AV:N/AC:L/Au:N/C:P/I:P/A:P`
- **134c704f-9b21-4f2e-91b3-4a467353bcc0** (Secondary, CVSS 3.1): 7.8 — score eligible
  - Evidence class: registered_adp_or_other; source rank: 2
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **CISA-ADP** (unknown, CVSS 3.1): 7.8 — display only
  - Evidence class: direct_cve_record_display_only; source rank: not applicable
  - Validation: display-only direct record assessment
  - Vector: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Applicability scope

- **n/a · Adobe Flash Player before 28.0.0.161** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "Adobe Flash Player before 28.0.0.161"}]
- **adobe · flash_player** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (< 28.0.0.161)
  - Canonical identity: `product-1f43dd2fb9df2cb64d1a717194e5325cf3f2d14dbb24ebbb35d9226a3dc1cbe7`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:flash_player:*:*:*:*:*:chrome:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:flash_player:*:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:flash_player:*:*:*:*:*:edge:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:flash_player:*:*:*:*:*:internet_explorer_11:*:*`
- **apple · macos** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-d6f53ba981bb58ea2b0d24855b8ff4a18555e3a17a9dce0d38460a69537bbc63`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*`
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*`
- **google · chrome_os** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-b52d99a799eb1164ea8aa4323a348a4e22f9a18f12d38b746456eb597b7a5d3d`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:google:chrome_os:-:*:*:*:*:*:*:*`
- **linux · linux_kernel** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-0eda7a801761be4590f267cf319481c8c0aaa30546d99cc064edf77989ce05c9`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*`
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*`
- **microsoft · windows** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-6a798dc931affc038ba266631a506d54b455ffebd96b4fae68f77b6bd7aef178`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*`
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*`
- **microsoft · windows_10** (environmental_constraint; constrained)
  - Versions: Any version (unconstrained)
  - Canonical identity: `product-706d745b7981e13adc9253e654169f399f239fa0f1df2a375eb22fb6bc44afce`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*`
- **microsoft · windows_8.1** (environmental_constraint; constrained)
  - Versions: Any version (unconstrained)
  - Canonical identity: `product-7e46de82012029583622f69d79b86bc210b5bd25b8cb3bb4468936702b23c4b0`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:*:*`
- **redhat · enterprise_linux_desktop** (vulnerable_target; supported)
  - Versions: Version 6.0
  - Canonical identity: `product-ebce605e64c58caa7df6a30e91702332cd8c0be8f801e44353e6350e913ec5ae`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*`
- **redhat · enterprise_linux_server** (vulnerable_target; supported)
  - Versions: Version 6.0
  - Canonical identity: `product-8db20157ede2f731f576213a7e555a24d2424bb17aed8e43ad9b77c3587f9dea`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*`
- **redhat · enterprise_linux_workstation** (vulnerable_target; supported)
  - Versions: Version 6.0
  - Canonical identity: `product-b2aa744c9fb2b4ef0e3b842acbf37879ad4ac43af291292cfb0906170b204ab9`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*`

## Identity source boundaries

- **cpe_dictionary**: 1775266 records through 2026-07-21T06:45:29.809553+00:00
  - Run: `27d65b0f-b718-4b4f-bb79-c47c68d09dfa`
- **cpe_match**: 643502 records through 2026-07-21T08:13:17.697275+00:00
  - Run: `955dae73-7302-438b-aee1-058d7cc5d48e`

## Limitations and unknowns

- 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; unresolved scope remains unknown.
- NVD-carried upstream facts remain derivative and are not independent corroboration.
- 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.
- Factor D remains unknown because WC-03 has not converted canonical CPE mappings into generation-bound mapping obligations; canonical identity alone does not score applicability.
- Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.

Generated from CASCA normalized evidence. This receipt is not proof that an asset is affected, unaffected, safe, or fixed.