{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T16:43:04Z","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","advisory":{"id":"cisco-sa-c9800-cwa-acl-nPSbHSnA","slug":"cisco-sa-c9800-cwa-acl-npsbhsna","vendor":"Cisco","title":"Cisco IOS XE Software  for Wireless Controllers CWA Pre-Authentication ACL Bypass Vulnerability","summary":"A vulnerability in the Central Web Authentication (CWA) feature of Cisco IOS XE Software for Wireless Controllers could allow an unauthenticated, adjacent attacker to bypass the pre-authentication access control list (ACL), which could allow access to network resources before user authentication. This vulnerability is due to a logic error when activating the pre-authentication ACL that is received from the authentication, authorization, and accounting (AAA) server. An attacker could exploit this vulnerability by connecting to a wireless network that is configured for CWA and sending traffic through an affected device that should be denied by the configured ACL before user authentication. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device before the user authentication is completed, allowing the attacker to access trusted networks that the device might be protecting. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA This advisory is part of the September 2024 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2024 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.","severity":"Medium","published_at":"2024-09-25T16:00:00Z","updated_at":"2024-09-25T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA/csaf/cisco-sa-c9800-cwa-acl-nPSbHSnA.json","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure."},"freshness":{"last_source_refreshed_at":"2026-07-21T05:16:34Z","latest_source_refresh_at":"2026-07-21T05:16:34Z","oldest_source_refresh_at":"2026-07-21T03:00:03Z","all_sources_fresh":true,"sources":[{"source":"cisco_advisories","label":"Cisco advisories","last_success_at":"2026-07-21T03:00:03Z","stale":false},{"source":"cisco_csaf","label":"Cisco CSAF","last_success_at":"2026-07-21T05:14:24Z","stale":false},{"source":"nvd_cves","label":"NVD CVEs","last_success_at":"2026-07-21T05:16:30Z","stale":false},{"source":"cisa_kev","label":"CISA KEV","last_success_at":"2026-07-21T05:16:31Z","stale":false},{"source":"first_epss","label":"EPSS","last_success_at":"2026-07-21T05:16:34Z","stale":false}]},"summary":{"cve_count":1,"visible_product_count":3,"public_evidence_count":3,"kev_count":0,"highest_epss":0.00276},"cves":[{"id":"CVE-2024-20510","kev":false,"epss":{"score":0.00276,"percentile":0.19648,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"}}],"public_evidence":[{"product":{"name":"Cisco IOS XE Software","slug":"cisco-ios-xe-software","vendor":"Cisco"},"cve":{"id":"CVE-2024-20510"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T02:19:08Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.10.1a; 16.10.1b; 16.10.1c; 16.10.1d; 16.10.1e; 16.10.1f; 16.10.1g; 16.10.1s; 16.11.1; 16.11.1c; 16.11.1s; 16.11.2; 16.12.1; 16.12.10; 16.12.10a; 16.12.11; 16.12.1a; 16.12.1c; 16.12.1s; 16.12.1t; 16.12.1w; 16.12.1x; 16.12.1y; 16.12.1z; 16.12.1z1; 16.12.1z2; 16.12.2; 16.12.2a; 16.12.2s; 16.12.2t; 16.12.3a; 16.12.3s; 16.12.5a; 16.12.5b; 16.12.6; 16.12.6a; 16.12.7; 16.12.8; 16.12.9; 16.3.1; 16.3.10; 16.3.11; 16.3.1a; 16.3.2; 16.3.4; 16.3.5; 16.3.5b; 16.3.6; 16.3.7; 16.3.8; 16.3.9; 16.4.1; 16.4.2; 16.4.3; 16.5.1; 16.5.1a; 16.5.1b; 16.5.2; 16.5.3; 16.6.1; 16.6.10; 16.6.2; 16.6.3; 16.6.4; 16.6.4a; 16.6.4s; 16.6.5; 16.6.5a; 16.6.5b; 16.6.6; 16.6.7; 16.6.7a; 16.6.8; 16.6.9; 16.7.1; 16.7.1a; 16.7.1b; 16.7.2; 16.7.3; 16.7.4; 16.8.1; 16.8.1a; 16.8.1b; 16.8.1c; 16.8.1d; 16.8.1e; 16.8.1s; 16.8.2; 16.8.3; 16.9.1a; 16.9.1b; 16.9.1c; 16.9.1d; 16.9.1s; 16.9.2a; 16.9.2s; 16.9.3a; 16.9.3h; 16.9.3s; 16.9.4c; 16.9.5; 16.9.5f; 16.9.6; 16.9.7; 16.9.8; 16.9.8a; 16.9.8b; 17.1.1; 17.1.1a; 17.1.1s; 17.1.1t; 17.1.2; 17.1.3; 17.10.1; 17.10.1a; 17.10.1b; 17.11.1; 17.11.1a; 17.11.99SW; 17.12.1; 17.12.1a; 17.12.1w; 17.12.1x; 17.12.1y; 17.12.2; 17.12.2a; 17.12.3; 17.13.1; 17.13.1a; 17.2.1; 17.2.1a; 17.2.1r; 17.2.1v; 17.2.2; 17.2.3; 17.3.1; 17.3.1a; 17.3.1w; 17.3.1x; 17.3.1z; 17.3.2; 17.3.2a; 17.3.3; 17.3.3a; 17.3.4; 17.3.4a; 17.3.4b; 17.3.4c; 17.3.5; 17.3.5a; 17.3.5b; 17.3.6; 17.3.7; 17.3.8; 17.3.8a; 17.4.1; 17.4.1a; 17.4.1b; 17.4.1c; 17.4.2; 17.4.2a; 17.5.1; 17.5.1a; 17.5.1b; 17.5.1c; 17.6.1; 17.6.1a; 17.6.1w; 17.6.1x; 17.6.1y; 17.6.1z; 17.6.1z1; 17.6.2; 17.6.3; 17.6.3a; 17.6.5; 17.6.5a; 17.6.6; 17.6.6a; 17.6.7; 17.7.1; 17.7.1a; 17.7.1b; 17.7.2; 17.8.1; 17.8.1a; 17.9.1; 17.9.1a; 17.9.1w; 17.9.1x; 17.9.1x1; 17.9.1y; 17.9.1y1; 17.9.2; 17.9.2a; 17.9.3; 17.9.3a; 17.9.4; 17.9.4a; 17.9.5; 17.9.5a; 17.9.5b; 17.9.5c; 17.9.5d; 17.9.5e; 17.9.5f","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00276,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2024-09-25T16:00:00Z","updated_at":"2024-09-25T16:00:00Z","advisory_updated_at":"2024-09-25T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA"},"row_display_order":1},{"product":{"name":"Cisco Adaptive Security Appliance (ASA) Software","slug":"cisco-adaptive-security-appliance-asa-software","vendor":"Cisco"},"cve":{"id":"CVE-2024-20510"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T02:19:08Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.3.3","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00276,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2024-09-25T16:00:00Z","updated_at":"2024-09-25T16:00:00Z","advisory_updated_at":"2024-09-25T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA"},"row_display_order":2},{"product":{"name":"Cisco IOS XE Catalyst SD-WAN","slug":"cisco-ios-xe-catalyst-sd-wan","vendor":"Cisco"},"cve":{"id":"CVE-2024-20510"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T02:19:08Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.10.1; 16.10.2; 16.10.3; 16.11.1a; 16.11.1b; 16.12.3; 16.12.4; 16.12.4a; 16.12.5; 16.9.1; 16.9.2; 16.9.3; 16.9.4; 17.6.4","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00276,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2024-09-25T16:00:00Z","updated_at":"2024-09-25T16:00:00Z","advisory_updated_at":"2024-09-25T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-cwa-acl-nPSbHSnA"},"row_display_order":3}]}