# CASCA evidence receipt — CVE-2018-4990

- Generation: `gen-409cbd0c74ff4feb70e4944e6b98ce40`
- As known: 2026-07-21T08:13:17.697275+00:00
- Comparison: gen-56ccdaf914f7b4be95b689ccae7dc20d
- Score policy: public-priority-v1.0.1
- Conflict: present

## Source assertions

- **adobe** (original_assertion): container — Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Double Free vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2018-4990
- **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-2018-4990
- **CVE** (derivative_copy): container — CVE Program Container
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2018-4990
- **CISA KEV** (original_assertion): observed_exploitation — Adobe Acrobat and Reader Double 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 0.363650000000; percentile 0.983130000000
  - 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): 8.8 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **nvd@nist.gov** (Primary, CVSS 2.0): 6.8 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `AV:N/AC:M/Au:N/C:P/I:P/A:P`
- **134c704f-9b21-4f2e-91b3-4a467353bcc0** (Secondary, CVSS 3.1): 8.8 — score eligible
  - Evidence class: registered_adp_or_other; source rank: 2
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **CISA-ADP** (unknown, CVSS 3.1): 8.8 — display only
  - Evidence class: direct_cve_record_display_only; source rank: not applicable
  - Validation: display-only direct record assessment
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Applicability scope

- **n/a · Adobe Acrobat and Reader 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier versions** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "Adobe Acrobat and Reader 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier versions"}]
- **adobe · acrobat_dc** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 15.006.30060, <= 15.006.30417); Any version (unconstrained) (>= 15.008.20082, <= 18.011.20038); Any version (unconstrained) (>= 17.011.30059, <= 17.011.30079)
  - Canonical identity: `product-d52f4403db2ec33efef1ee4992d557c81863172cde027cc48feadace7f308abe`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*`
- **adobe · acrobat_reader_dc** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 15.006.30060, <= 15.006.30417); Any version (unconstrained) (>= 15.008.20082, <= 18.011.20038); Any version (unconstrained) (>= 17.011.30059, <= 17.011.30079)
  - Canonical identity: `product-555cc538304e4c7c06c06beb18e8ee52245d2f3acee3e0665299abb4e555a3d9`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*`
- **apple · mac_os_x** (environmental_constraint; constrained)
  - Versions: Any version (unconstrained)
  - Canonical identity: `product-94613e1f5039e71a9805f20421d56ac6a61e2707d3f97a08fdf6823a65dc7b76`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*`
- **microsoft · windows** (environmental_constraint; constrained)
  - Versions: Any version (unconstrained)
  - Canonical identity: `product-6a798dc931affc038ba266631a506d54b455ffebd96b4fae68f77b6bd7aef178`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:*`

## 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.