{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T11:05:16Z","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-cat9k-acl-L4K7VXgD","slug":"cisco-sa-cat9k-acl-l4k7vxgd","vendor":"Cisco","title":"Cisco IOS XE Software on Cisco Catalyst 9500X and 9600X Series Switches Virtual Interface Access Control List Bypass Vulnerability","summary":"A vulnerability in the access control list (ACL) programming of Cisco IOS XE Software for Cisco Catalyst 9500X and 9600X Series Switches could allow an unauthenticated, remote attacker to bypass a configured ACL on an affected device. This vulnerability is due to the flooding of traffic from an unlearned MAC address on a switch virtual interface (SVI) that has an egress ACL applied. An attacker could exploit this vulnerability by causing the VLAN to flush its MAC address table. This condition can also occur if the MAC address table is full. A successful exploit could allow the attacker to bypass an egress ACL on an affected device. 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-cat9k-acl-L4K7VXgD This advisory is part of the September 2025 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 2025 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.","severity":"Medium","published_at":"2025-09-24T16:00:00Z","updated_at":"2025-09-24T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD/csaf/cisco-sa-cat9k-acl-L4K7VXgD.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},"cves":[{"id":"CVE-2025-20316","kev":false}],"public_evidence":[{"product":{"name":"Cisco IOS XE Software","slug":"cisco-ios-xe-software","vendor":"Cisco"},"cve":{"id":"CVE-2025-20316"},"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":"2026-07-20T01:27:40Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"17.10.1; 17.10.1b; 17.11.1; 17.12.1; 17.12.1z2; 17.12.1z3; 17.12.1z4; 17.12.1z5; 17.12.1z6; 17.12.2; 17.12.3; 17.12.4; 17.12.5; 17.12.5a; 17.12.5b; 17.12.5c; 17.12.5d; 17.13.1; 17.14.1; 17.15.1; 17.15.1a; 17.15.1b; 17.15.1w; 17.15.1x; 17.15.1y; 17.15.1z; 17.15.2; 17.15.2a; 17.15.2b; 17.15.2c; 17.15.3; 17.15.3a; 17.15.3b; 17.16.1; 17.16.1a; 17.17.1; 17.18.0EFT; 17.7.1; 17.8.1; 17.9.1; 17.9.2; 17.9.3; 17.9.4; 17.9.4a; 17.9.5; 17.9.6; 17.9.6a; 17.9.6b; 17.9.7; 17.9.7a; 17.9.7b","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,"published_at":"2025-09-24T16:00:00Z","updated_at":"2025-09-24T16:00:00Z","advisory_updated_at":"2025-09-24T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD"},"row_display_order":1},{"product":{"name":"Cisco Catalyst 9500 Series Switches","slug":"cisco-catalyst-9500-series-switches","vendor":"Cisco"},"cve":{"id":"CVE-2025-20316"},"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":"2026-07-20T01:27:40Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Software Release 17.10.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.10.1b when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.11.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.1z2 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.1z3 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.1z4 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.1z5 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.1z6 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.2 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.3 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.4 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.5 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.5a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.5b when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.5c when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.12.5d when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.13.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.14.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1b when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1w when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1x when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1y when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.1z when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.2 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.2a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.2b when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.2c when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.3 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.3a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.15.3b when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.16.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.16.1a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.17.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.18.0EFT when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.7.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.8.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.1 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.2 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.3 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.4 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.4a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.5 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.6 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.6a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.6b when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.7 when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.7a when installed on Cisco Catalyst 9500 Series Switches; Cisco IOS XE Software Release 17.9.7b when installed on Cisco Catalyst 9500 Series Switches","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,"published_at":"2025-09-24T16:00:00Z","updated_at":"2025-09-24T16:00:00Z","advisory_updated_at":"2025-09-24T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD","row_display_order":2},{"product":{"name":"Cisco Adaptive Security Appliance (ASA) Software","slug":"cisco-adaptive-security-appliance-asa-software","vendor":"Cisco"},"cve":{"id":"CVE-2025-20316"},"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":"2026-07-20T01:27:40Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Software Release 17.10.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.10.1b when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.11.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.1z2 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.1z3 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.1z4 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.1z5 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.1z6 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.2 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.3 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.4 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.5 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.5a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.5b when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.5c when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.12.5d when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.13.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.14.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1b when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1w when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1x when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1y when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.1z when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.2 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.2a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.2b when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.2c when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.3 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.3a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.15.3b when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.16.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.16.1a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.17.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.18.0EFT when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.7.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.8.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.1 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.2 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.3 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.4 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.4a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.5 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.6 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.6a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.6b when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.7 when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.7a when installed on Cisco Adaptive Security Appliance (ASA) Software; Cisco IOS XE Software Release 17.9.7b when installed on Cisco Adaptive Security Appliance (ASA) Software","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,"published_at":"2025-09-24T16:00:00Z","updated_at":"2025-09-24T16:00:00Z","advisory_updated_at":"2025-09-24T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-acl-L4K7VXgD","row_display_order":3}]}