{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T10:12:12Z","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-20180620-nxos-cdp","slug":"cisco-sa-20180620-nxos-cdp","vendor":"Cisco","title":"Cisco FXOS, NX-OS, and UCS Manager Software Cisco Discovery Protocol Denial of Service Vulnerability","summary":"A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or based on, Cisco NX-OS Software contain a vulnerability that could allow an unauthenticated, adjacent attacker to create a denial of service (DoS) condition. The vulnerability is due to a failure to properly validate certain fields within a Cisco Discovery Protocol message prior to processing it. An attacker with the ability to submit a Cisco Discovery Protocol message designed to trigger the issue could cause a DoS condition on an affected device while the device restarts. 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-20180620-nxos-cdp This advisory is part of the June 2018 Cisco FXOS and NX-OS Software Security Advisory Collection, which includes 24 Cisco Security Advisories that describe 24 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: June 2018 Cisco FXOS and NX-OS Software Security Advisory Collection.","severity":"High","published_at":"2018-06-20T23:00:00Z","updated_at":"2018-07-06T04:12:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp/csaf/cisco-sa-20180620-nxos-cdp.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":5,"public_evidence_count":5,"kev_count":0,"highest_epss":0.0064},"cves":[{"id":"CVE-2018-0331","kev":false,"epss":{"score":0.0064,"percentile":0.46675,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"}}],"public_evidence":[{"product":{"name":"Cisco NX-OS Software","slug":"cisco-nx-os-software","vendor":"Cisco"},"cve":{"id":"CVE-2018-0331"},"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":"2026-07-20T00:20:52Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"4.0(0)N1(1a); 4.0(0)N1(2); 4.0(0)N1(2a); 4.0(1a)N1(1); 4.0(1a)N1(1a); 4.0(1a)N2(1); 4.0(1a)N2(1a); 4.1(3)N1(1); 4.1(3)N1(1a); 4.1(3)N2(1); 4.1(3)N2(1a); 4.2(1)N1(1); 4.2(1)N2(1); 4.2(1)N2(1a); 4.2(1)SV1(4); 4.2(1)SV1(4a); 4.2(1)SV1(4b); 4.2(1)SV1(5.1); 4.2(1)SV1(5.1a); 4.2(1)SV1(5.2); 4.2(1)SV1(5.2b); 4.2(1)SV2(1.1); 4.2(1)SV2(1.1a); 4.2(1)SV2(2.1); 4.2(1)SV2(2.1a); 4.2(1)SV2(2.2); 4.2(1)SV2(2.3); 4.2(2a); 4.2(4); 5.0(2)N1(1); 5.0(2)N2(1); 5.0(2)N2(1a); 5.0(2a); 5.0(3)A1(1); 5.0(3)A1(2); 5.0(3)A1(2a); 5.0(3)N1(1); 5.0(3)N1(1a); 5.0(3)N1(1b); 5.0(3)N1(1c); 5.0(3)N2(1); 5.0(3)N2(2); 5.0(3)N2(2a); 5.0(3)N2(2b); 5.0(3)U1(1); 5.0(3)U1(1a); 5.0(3)U1(1b); 5.0(3)U1(1c); 5.0(3)U1(1d); 5.0(3)U1(2); 5.0(3)U1(2a); 5.0(3)U2(1); 5.0(3)U2(2); 5.0(3)U2(2a); 5.0(3)U2(2b); 5.0(3)U2(2c); 5.0(3)U2(2d); 5.0(3)U3(1); 5.0(3)U3(2); 5.0(3)U3(2a); 5.0(3)U3(2b); 5.0(3)U4(1); 5.0(3)U5(1); 5.0(3)U5(1a); 5.0(3)U5(1b); 5.0(3)U5(1c); 5.0(3)U5(1d); 5.0(3)U5(1e); 5.0(3)U5(1f); 5.0(3)U5(1g); 5.0(3)U5(1h); 5.0(3)U5(1i); 5.0(3)U5(1j); 5.0(5); 5.1(1a); 5.1(3); 5.1(3)N1(1); 5.1(3)N1(1a); 5.1(3)N2(1); 5.1(3)N2(1a); 5.1(3)N2(1b); 5.1(3)N2(1c); 5.1(5); 5.2(1); 5.2(1)N1(1); 5.2(1)N1(1a); 5.2(1)N1(1b); 5.2(1)N1(2); 5.2(1)N1(2a); 5.2(1)N1(3); 5.2(1)N1(4); 5.2(1)N1(5); 5.2(1)N1(6); 5.2(1)N1(7); 5.2(1)N1(8); 5.2(1)N1(8a); 5.2(1)N1(8b); 5.2(1)N1(9); 5.2(1)N1(9a); 5.2(1)N1(9b); 5.2(1)SM1(5.1); 5.2(1)SV3(1.1); 5.2(1)SV3(1.10); 5.2(1)SV3(1.2); 5.2(1)SV3(1.3); 5.2(1)SV3(1.4); 5.2(1)SV3(1.4b); 5.2(1)SV3(1.5a); 5.2(1)SV3(1.5b); 5.2(1)SV3(1.6); 5.2(3); 5.2(3a); 5.2(4); 5.2(7); 5.2(9); 5.2(9)N1(1); 5.2(9a); 6.0(2); 6.0(2)A1(1); 6.0(2)A1(1a); 6.0(2)A1(1b); 6.0(2)A1(1c); 6.0(2)A1(1d); 6.0(2)A1(1e); 6.0(2)A1(1f); 6.0(2)A1(2d); 6.0(2)A3(1); 6.0(2)A3(2); 6.0(2)A3(4); 6.0(2)A4(1); 6.0(2)A4(2); 6.0(2)A4(3); 6.0(2)A4(4); 6.0(2)A4(5); 6.0(2)A4(6); 6.0(2)A6(1); 6.0(2)A6(1a); 6.0(2)A6(2); 6.0(2)A6(2a); 6.0(2)A6(3); 6.0(2)A6(3a); 6.0(2)A6(4); 6.0(2)A6(4a); 6.0(2)A6(5); 6.0(2)A6(5a); 6.0(2)A6(5b); 6.0(2)A6(6); 6.0(2)A6(7); 6.0(2)A6(8); 6.0(2)A7(1); 6.0(2)A7(1a); 6.0(2)A7(2); 6.0(2)A7(2a); 6.0(2)A8(1); 6.0(2)A8(2); 6.0(2)A8(3); 6.0(2)A8(4); 6.0(2)A8(4a); 6.0(2)N1(1); 6.0(2)N1(1a); 6.0(2)N1(2); 6.0(2)N1(2a); 6.0(2)N2(1); 6.0(2)N2(1b); 6.0(2)N2(2); 6.0(2)N2(3); 6.0(2)N2(4); 6.0(2)N2(5); 6.0(2)N2(5a); 6.0(2)N2(6); 6.0(2)N2(7); 6.0(2)U1(1); 6.0(2)U1(1a); 6.0(2)U1(2); 6.0(2)U1(3); 6.0(2)U1(4); 6.0(2)U2(1); 6.0(2)U2(2); 6.0(2)U2(3); 6.0(2)U2(4); 6.0(2)U2(5); 6.0(2)U2(6); 6.0(2)U3(1); 6.0(2)U3(2); 6.0(2)U3(3); 6.0(2)U3(4); 6.0(2)U3(5); 6.0(2)U3(6); 6.0(2)U3(7); 6.0(2)U3(8); 6.0(2)U3(9); 6.0(2)U4(1); 6.0(2)U4(2); 6.0(2)U4(3); 6.0(2)U4(4); 6.0(2)U5(1); 6.0(2)U5(2); 6.0(2)U5(3); 6.0(2)U5(4); 6.0(2)U6(1); 6.0(2)U6(10); 6.0(2)U6(1a); 6.0(2)U6(2); 6.0(2)U6(2a); 6.0(2)U6(3); 6.0(2)U6(3a); 6.0(2)U6(4); 6.0(2)U6(4a); 6.0(2)U6(5); 6.0(2)U6(5a); 6.0(2)U6(5b); 6.0(2)U6(5c); 6.0(2)U6(6); 6.0(2)U6(7); 6.0(2)U6(8); 6.0(2)U6(9); 6.0(3); 6.0(4); 6.1(2)I1(1); 6.1(2)I1(2); 6.1(2)I1(3); 6.1(2)I2(1); 6.1(2)I2(2); 6.1(2)I2(2a); 6.1(2)I2(2b); 6.1(2)I2(3); 6.1(2)I3(1); 6.1(2)I3(2); 6.1(2)I3(3); 6.1(2)I3(3.78); 6.1(2)I3(3a); 6.1(2)I3(3b); 6.1(2)I3(4); 6.1(2)I3(4a); 6.1(2)I3(4b); 6.1(2)I3(4c); 6.1(2)I3(4d); 6.1(2)I3(4e); 6.1(2)I3(5); 6.1(2)I3(5a); 6.1(2)I3(5b); 6.1(3)S5; 6.1(3)S6; 6.1(4); 6.1(4a); 6.1(5a); 6.2(10); 6.2(11b); 6.2(11c); 6.2(11d); 6.2(11e); 6.2(12); 6.2(13a); 6.2(13b); 6.2(14); 6.2(14a); 6.2(14b); 6.2(15); 6.2(16); 6.2(17); 6.2(18); 6.2(19); 6.2(2a); 6.2(5); 6.2(5a); 6.2(5b); 6.2(6); 6.2(6a); 6.2(6b); 6.2(8a); 6.2(8b); 6.2(9a); 6.2(9b); 6.2(9c); 7.0(0)N1(1); 7.0(1)N1(1); 7.0(1)N1(3); 7.0(2)I2(2c); 7.0(2)N1(1); 7.0(2)N1(1a); 7.0(3)F1(1); 7.0(3)F2(1); 7.0(3)F2(2); 7.0(3)I1(1); 7.0(3)I1(1a); 7.0(3)I1(1b); 7.0(3)I1(2); 7.0(3)I1(3); 7.0(3)I1(3a); 7.0(3)I1(3b); 7.0(3)I2(1); 7.0(3)I2(1a); 7.0(3)I2(2); 7.0(3)I2(2a); 7.0(3)I2(2b); 7.0(3)I2(2c); 7.0(3)I2(2d); 7.0(3)I2(2e); 7.0(3)I2(3); 7.0(3)I2(4); 7.0(3)I2(5); 7.0(3)I3(1); 7.0(3)I4(1); 7.0(3)I4(2); 7.0(3)I4(3); 7.0(3)I4(4); 7.0(3)I4(5); 7.0(3)I4(6); 7.0(3)I5(1); 7.0(3)I5(2); 7.0(3)I6(1); 7.0(3)IX1(2); 7.0(3)IX1(2a); 7.0(3)N1(1); 7.0(4)N1(1); 7.0(4)N1(1a); 7.0(5)N1(1); 7.0(5)N1(1a); 7.0(6)N1(1); 7.0(6)N1(1c); 7.0(6)N1(2s); 7.0(6)N1(3s); 7.0(6)N1(4s); 7.0(7)N1(1); 7.0(7)N1(1a); 7.0(7)N1(1b); 7.0(8)N1(1); 7.0(8)N1(1a); 7.1(0)N1(1); 7.1(0)N1(1a); 7.1(0)N1(1b); 7.1(0)N1(2); 7.1(1)N1(1); 7.1(1)N1(1a); 7.1(2)N1(1); 7.1(2)N1(1a); 7.1(3)N1(1); 7.1(3)N1(1b); 7.1(3)N1(2); 7.1(3)N1(2.1); 7.1(3)N1(2a); 7.1(3)N1(3); 7.1(3)N1(3.12); 7.1(3)N1(4); 7.1(3)N1(5); 7.1(4)N1(1); 7.1(4)N1(1a); 7.1(4)N1(1c); 7.1(4)N1(1d); 7.1(4)N1(1e); 7.2(0)D1(0.437); 7.2(0)D1(1); 7.2(0)N1(1); 7.2(0)ZZ(99.1); 7.2(1)D1(1); 7.2(1)N1(1); 7.2(2)D1(1); 7.2(2)D1(2); 7.3(0)D1(1); 7.3(0)DX(1); 7.3(0)DY(1); 7.3(0)N1(1); 7.3(0)N1(1a); 7.3(0)N1(1b); 7.3(0.2); 7.3(1)D1(1); 7.3(1)D1(1B); 7.3(1)DY(1); 7.3(1)N1(0.1); 7.3(1)N1(1); 7.3(2)N1(0.296); 7.3(2)N1(1); 8.1(1a)","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":0.0064,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2018-06-20T23:00:00Z","updated_at":"2018-07-06T04:12:00Z","advisory_updated_at":"2018-07-06T04:12:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp"},"row_display_order":1},{"product":{"name":"Cisco Adaptive Security Appliance (ASA) Software","slug":"cisco-adaptive-security-appliance-asa-software","vendor":"Cisco"},"cve":{"id":"CVE-2018-0331"},"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":"2026-07-20T00:20:52Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"4.1(2); 4.1(3); 4.1(5); 4.2(3); 4.2(6); 4.2(8); 5.1(1); 5.1(4); 5.1(6); 5.2(5); 6.1(1); 6.1(2); 6.1(3); 6.1(5); 6.2(1); 6.2(11); 6.2(13); 6.2(2); 6.2(3); 6.2(7); 6.2(8); 6.2(9); 7.0(3); 8.0(1); 8.1(1)","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":0.0064,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2018-06-20T23:00:00Z","updated_at":"2018-07-06T04:12:00Z","advisory_updated_at":"2018-07-06T04:12:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp"},"row_display_order":2},{"product":{"name":"Cisco Firepower Management Center","slug":"cisco-firepower-management-center","vendor":"Cisco"},"cve":{"id":"CVE-2018-0331"},"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":"2026-07-20T00:20:52Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"4.1(4); 5.0(3); 6.0(1)","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":0.0064,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2018-06-20T23:00:00Z","updated_at":"2018-07-06T04:12:00Z","advisory_updated_at":"2018-07-06T04:12:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp"},"row_display_order":3},{"product":{"name":"Cisco Firepower Extensible Operating System (FXOS)","slug":"cisco-firepower-extensible-operating-system-fxos","vendor":"Cisco"},"cve":{"id":"CVE-2018-0331"},"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":"2026-07-20T00:20:52Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"2.0.1.68","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":0.0064,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2018-06-20T23:00:00Z","updated_at":"2018-07-06T04:12:00Z","advisory_updated_at":"2018-07-06T04:12:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp"},"row_display_order":4},{"product":{"name":"Cisco Unified Computing System (Managed)","slug":"cisco-unified-computing-system-managed","vendor":"Cisco"},"cve":{"id":"CVE-2018-0331"},"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":"2026-07-20T00:20:52Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Unified Computing System (Managed)","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":0.0064,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:33Z"},"published_at":"2018-06-20T23:00:00Z","updated_at":"2018-07-06T04:12:00Z","advisory_updated_at":"2018-07-06T04:12:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp"},"row_display_order":5}]}