# CASCA evidence receipt — CVE-2023-21608

- 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 — Adobe Acrobat Reader DC resetForm Use-After-Free Remote Code Execution Vulnerability
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-21608
- **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-2023-21608
- **CVE** (derivative_copy): container — CVE Program Container
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-21608
- **CISA KEV** (original_assertion): observed_exploitation — Adobe Acrobat and Reader 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 0.614750000000; percentile 0.990690000000
  - Observed: 2026-07-19T04:54:35.756809+00:00
  - Citation: https://www.first.org/epss/data_stats.html

## CVSS assessments

- **psirt@adobe.com** (Secondary, CVSS 3.1): 7.8 — score eligible
  - Evidence class: exact_record_cna; source rank: 1
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
- **adobe** (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

- **Adobe · Acrobat Reader** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "20.005.30418"}, {"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "22.003.20282"}, {"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "22.003.20281"}, {"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "None"}]
- **adobe · acrobat** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 20.001.30005, <= 20.005.30418)
  - Canonical identity: `product-ed5d44367bdcb90bad355d7e7359a851dedc6267deefc08f1c50b65634b9019c`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*`
- **adobe · acrobat_dc** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 15.008.20082, <= 22.003.20281); Any version (unconstrained) (>= 15.008.20082, <= 22.003.20282)
  - Canonical identity: `product-d52f4403db2ec33efef1ee4992d557c81863172cde027cc48feadace7f308abe`
  - Official link states: linked_exact
  - 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:*:*:*:*:continuous:*:*:*`
- **adobe · acrobat_reader** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 20.001.30005, <= 20.005.30418)
  - Canonical identity: `product-600b6c3e0d80d39770793f8a9da27b869cd246427b21a98d939c2f7b40e67886`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*`
- **adobe · acrobat_reader_dc** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (>= 15.008.20082, <= 22.003.20281); Any version (unconstrained) (>= 15.008.20082, <= 22.003.20282)
  - Canonical identity: `product-555cc538304e4c7c06c06beb18e8ee52245d2f3acee3e0665299abb4e555a3d9`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*`
- **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:-:*:*:*:*:*:*:*`
- **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:-:*:*:*:*:*:*:*`

## 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.