{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T11:18:28Z","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-nxos-ebgp-dos-L3QCwVJ","slug":"cisco-sa-nxos-ebgp-dos-l3qcwvj","vendor":"Cisco","title":"Cisco NX-OS Software External Border Gateway Protocol Denial of Service Vulnerability","summary":"A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue. An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device. A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network. 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-nxos-ebgp-dos-L3QCwVJ This advisory is part of the February 2024 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: February 2024 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication.","severity":"High","published_at":"2024-02-28T16:00:00Z","updated_at":"2024-02-28T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ/csaf/cisco-sa-nxos-ebgp-dos-L3QCwVJ.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":2,"public_evidence_count":2,"kev_count":0,"highest_epss":0.00709},"cves":[{"id":"CVE-2024-20321","kev":false,"epss":{"score":0.00709,"percentile":0.49395,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"}}],"public_evidence":[{"product":{"name":"Cisco Nexus 3000 Series Switches","slug":"cisco-nexus-3000-series-switches","vendor":"Cisco"},"cve":{"id":"CVE-2024-20321"},"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":"2026-07-20T04:10:16Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco NX-OS Software 10.1(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.1(2) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.1(2t) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(2) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(3) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(3t) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(3v) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(4) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(5) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.2(6) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.3(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.3(2) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.3(3) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 10.4(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(2) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(3) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(3a) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(3c) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(4) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 7.0(3)F3(5) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(2) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(2t) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(2v) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(3) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.2(4) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(1) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(10) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(11) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(12) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(2) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(3) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(4) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(5) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(6) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(7) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(7a) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(7k) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(8) when installed on Cisco Nexus 3000 Series Switches; Cisco NX-OS Software 9.3(9) when installed on Cisco Nexus 3000 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,"epss":{"score":0.00709,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"},"published_at":"2024-02-28T16:00:00Z","updated_at":"2024-02-28T16:00:00Z","advisory_updated_at":"2024-02-28T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ"},"row_display_order":1},{"product":{"name":"Cisco Nexus 9000 Series Switches","slug":"cisco-nexus-9000-series-switches","vendor":"Cisco"},"cve":{"id":"CVE-2024-20321"},"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":"2026-07-20T04:10:16Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco NX-OS Software 10.1(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.1(2) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(1q) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(2) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(2a) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(3) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(4) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(5) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.2(6) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(2) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3o) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3p) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3q) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3r) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3w) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(3x) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(4) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(4a) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(4g) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(4h) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(99w) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.3(99x) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 10.4(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 7.0(3)F3(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 7.0(3)F3(3) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 7.0(3)F3(3a) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 7.0(3)F3(3c) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 7.0(3)F3(4) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 7.0(3)F3(5) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.2(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.2(2) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.2(3) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.2(3y) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.2(4) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(1) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(10) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(11) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(12) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(1z) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(2) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(3) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(4) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(5) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(5w) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(6) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(7) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(7a) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(7k) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(8) when installed on Cisco Nexus 9000 Series Switches; Cisco NX-OS Software 9.3(9) when installed on Cisco Nexus 9000 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,"epss":{"score":0.00709,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:49Z"},"published_at":"2024-02-28T16:00:00Z","updated_at":"2024-02-28T16:00:00Z","advisory_updated_at":"2024-02-28T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ebgp-dos-L3QCwVJ"},"row_display_order":2}]}