# CASCA evidence receipt — CVE-2023-23397

- 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

- **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-2023-23397
- **CVE** (derivative_copy): container — CVE Program Container
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-23397
- **microsoft** (original_assertion): container — Microsoft Outlook Elevation of Privilege Vulnerability
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2023-23397
- **CISA KEV** (original_assertion): observed_exploitation — Microsoft Office Outlook Privilege Escalation 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 0.974080000000; percentile 0.998900000000
  - 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): 9.8 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- **secure@microsoft.com** (Secondary, CVSS 3.1): 9.8 — score eligible
  - Evidence class: exact_record_cna; source rank: 1
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- **microsoft** (unknown, CVSS 3.1): 9.8 — 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:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C`

## Applicability scope

- **Microsoft · Microsoft 365 Apps for Enterprise** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}]
- **Microsoft · Microsoft Office 2019** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "19.0.0", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}]
- **Microsoft · Microsoft Office LTSC 2021** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}]
- **Microsoft · Microsoft Outlook 2013 Service Pack 1** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "15.0.0.0", "lessThan": "15.0.5537.1000", "versionType": "custom"}]
- **Microsoft · Microsoft Outlook 2016** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "16.0.0.0", "lessThan": "16.0.5387.1000", "versionType": "custom"}]
- **microsoft · 365_apps** (vulnerable_target; supported)
  - Versions: Version not applicable
  - Canonical identity: `product-14a59f3c1c4fc4cec4da9e1d602ac339da114e67c884352e121c41fb03b7a712`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*`
- **microsoft · office** (vulnerable_target; supported)
  - Versions: Version 2019
  - Canonical identity: `product-f4efee17050cd92d62299077c43827052b373ddcb783c02caa43c2fbb378d2f4`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*`
- **microsoft · office_long_term_servicing_channel** (vulnerable_target; supported)
  - Versions: Version 2021
  - Canonical identity: `product-911e466d0be7cb2953297756c47cb44a2f472c517f89b133f4ff5b03a0ab5264`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:*:*`
- **microsoft · outlook** (vulnerable_target; supported)
  - Versions: Version 2013; Version 2016
  - Canonical identity: `product-b312c98eb5c91fc7c3e69712233ab82c14dbc3f5723b9932de5a535b454ad87c`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:rt:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*`
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:-:*:*:*`

## 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.