{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T16:15:46Z","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-iosxe-ikev1-dos-XHk3HzFC","slug":"cisco-sa-iosxe-ikev1-dos-xhk3hzfc","vendor":"Cisco","title":"Cisco IOS XE Software Internet Key Exchange Version 1 Denial of Service Vulnerability","summary":"A vulnerability in the Internet Key Exchange version 1 (IKEv1) implementation of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The attacker must have valid IKEv1 VPN credentials to exploit this vulnerability. This vulnerability is due to improper validation of IKEv1 phase 2 parameters before the IPsec security association creation request is handed off to the hardware cryptographic accelerator of an affected device. An attacker could exploit this vulnerability by sending crafted IKEv1 messages to the affected device. A successful exploit could allow the attacker to cause the device to reload. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC This advisory is part of the May 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: May 2025 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.","severity":"High","published_at":"2025-05-07T16:00:00Z","updated_at":"2025-05-07T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC/csaf/cisco-sa-iosxe-ikev1-dos-XHk3HzFC.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-2025-20192","kev":false}],"public_evidence":[{"product":{"name":"Cisco IOS XE Software","slug":"cisco-ios-xe-software","vendor":"Cisco"},"cve":{"id":"CVE-2025-20192"},"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":"2026-07-20T01:59:44Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.10.1a; 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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; 17.12.1; 17.12.1a; 17.12.1w; 17.12.1x; 17.12.1y; 17.12.1z; 17.12.1z1; 17.12.2; 17.12.2a; 17.12.3; 17.12.3a; 17.13.1; 17.13.1a; 17.14.1; 17.14.1a; 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; 17.6.8; 17.6.8a; 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; 3.13.0S; 3.13.10S; 3.13.1S; 3.13.2S; 3.13.3S; 3.13.4S; 3.13.5S; 3.13.6S; 3.13.6aS; 3.13.7S; 3.13.8S; 3.13.9S; 3.14.0S; 3.14.1S; 3.14.2S; 3.14.3S; 3.14.4S; 3.15.0S; 3.15.1S; 3.15.1cS; 3.15.2S; 3.15.3S; 3.15.4S; 3.16.0S; 3.16.0cS; 3.16.10S; 3.16.10aS; 3.16.10bS; 3.16.1aS; 3.16.2S; 3.16.3S; 3.16.4aS; 3.16.4bS; 3.16.4cS; 3.16.4dS; 3.16.4eS; 3.16.4gS; 3.16.5S; 3.16.5aS; 3.16.5bS; 3.16.6S; 3.16.6bS; 3.16.7S; 3.16.7aS; 3.16.7bS; 3.16.8S; 3.16.9S; 3.17.0S; 3.17.1S; 3.17.2S; 3.17.3S; 3.17.4S; 3.18.2aSP; 3.18.3SP; 3.18.3aSP; 3.18.3bSP; 3.18.4S; 3.18.4SP; 3.18.5SP; 3.18.6SP; 3.18.7SP; 3.18.8aSP; 3.18.9SP","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":"2025-05-07T16:00:00Z","updated_at":"2025-05-07T16:00:00Z","advisory_updated_at":"2025-05-07T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC"},"row_display_order":1},{"product":{"name":"Cisco Adaptive Security Appliance (ASA) Software","slug":"cisco-adaptive-security-appliance-asa-software","vendor":"Cisco"},"cve":{"id":"CVE-2025-20192"},"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":"2026-07-20T01:59:44Z","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,"published_at":"2025-05-07T16:00:00Z","updated_at":"2025-05-07T16:00:00Z","advisory_updated_at":"2025-05-07T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ikev1-dos-XHk3HzFC"},"row_display_order":2},{"product":{"name":"Cisco IOS XE Catalyst SD-WAN","slug":"cisco-ios-xe-catalyst-sd-wan","vendor":"Cisco"},"cve":{"id":"CVE-2025-20192"},"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":"2026-07-20T01:59:44Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.10.1; 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