# CASCA evidence receipt — CVE-2022-20708

- 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

- **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-2022-20708
- **cisco** (original_assertion): container — Cisco Small Business RV Series Routers Vulnerabilities
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2022-20708
- **CVE** (derivative_copy): container — CVE Program Container
  - Observed: 2026-07-19T04:27:06.398189+00:00
  - Citation: https://www.cve.org/CVERecord?id=CVE-2022-20708
- **CISA KEV** (original_assertion): observed_exploitation — Cisco Small Business RV Series Routers Stack-based Buffer Overflow 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 0.148630000000; percentile 0.963190000000
  - 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 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
- **nvd@nist.gov** (Primary, CVSS 2.0): 10 — score eligible
  - Evidence class: nvd_enrichment_exact; source rank: 0
  - Validation: valid_match
  - Vector: `AV:N/AC:L/Au:N/C:C/I:C/A:C`
- **psirt@cisco.com** (Secondary, CVSS 3.1): 10 — 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:C/C:H/I:H/A:H`
- **cisco** (unknown, CVSS 3.1): 10 — 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:C/C:H/I:H/A:H`

## Applicability scope

- **Cisco · Cisco Small Business RV Series Router Firmware** (direct_source; unknown)
  - Versions: [{"status": "affected", "version": "n/a"}]
- **cisco · rv340** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-01da9ecb3b7fb6239b61273ac924db6cd0e5435e5d6f557ea75deb5af8badf46`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:h:cisco:rv340:-:*:*:*:*:*:*:*`
- **cisco · rv340_firmware** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (<= 1.0.03.24)
  - Canonical identity: `product-71954f222fc60b05adc78354f4678f244dacb856ab960191a43d001deb6a3492`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:cisco:rv340_firmware:*:*:*:*:*:*:*:*`
- **cisco · rv340w** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-78e7052fbdd34a64fcc429523fd631b36daa749def494082afe8b6ba2eb2a7b1`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:h:cisco:rv340w:-:*:*:*:*:*:*:*`
- **cisco · rv340w_firmware** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (<= 1.0.03.24)
  - Canonical identity: `product-c5059dfaedc43556329777513d6a91a13e8bdf3a045e87b008a3c7d02aecf58a`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:cisco:rv340w_firmware:*:*:*:*:*:*:*:*`
- **cisco · rv345** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-97441c4861b1b6f4266beedc47b0984650c84c3dc92cc5d34f66701e4957b94f`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:h:cisco:rv345:-:*:*:*:*:*:*:*`
- **cisco · rv345_firmware** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (<= 1.0.03.24)
  - Canonical identity: `product-5002ed34e5eb2e27fed9178a222cfc152387cb8505c1d32996fbf758d01a3051`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:cisco:rv345_firmware:*:*:*:*:*:*:*:*`
- **cisco · rv345p** (environmental_constraint; constrained)
  - Versions: Version not applicable
  - Canonical identity: `product-830f40d9f1ee8166a3ce3b15dc387e5e444496d36e4831b3b48b20179b2f65ec`
  - Official link states: linked_exact
  - Criterion (linked_exact, environmental_constraint): `cpe:2.3:h:cisco:rv345p:-:*:*:*:*:*:*:*`
- **cisco · rv345p_firmware** (vulnerable_target; supported)
  - Versions: Any version (unconstrained) (<= 1.0.03.24)
  - Canonical identity: `product-b2bd848ee20252dd968db368f43bf9a9616b6fc9f843e460c280475850181e13`
  - Official link states: linked_exact
  - Criterion (linked_exact, vulnerable_target): `cpe:2.3:o:cisco:rv345p_firmware:*:*:*:*:*:*:*:*`

## 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.