{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20033", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.353Z", "datePublished": "2026-02-25T16:26:29.215Z", "dateUpdated": "2026-02-25T19:05:48.146Z"}, "containers": {"cna": {"title": "Cisco NX-OS Software Denial of Service Vulnerability", "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}}], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficient validation when processing specific Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to the management interface of an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nNote: Only the out-of-band (OOB) management interface is affected."}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD", "name": "cisco-sa-nxos-cpdos-qLsv6pFD"}], "exploits": [{"lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}], "source": {"advisory": "cisco-sa-nxos-cpdos-qLsv6pFD", "discovery": "EXTERNAL", "defects": ["CSCwq96001"]}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "Buffer Access with Incorrect Length Value", "type": "cwe", "cweId": "CWE-805"}]}], "affected": [{"vendor": "Cisco", "product": "Cisco NX-OS System Software in ACI Mode", "versions": [{"version": "15.2(1g)", "status": "affected"}, {"version": "15.2(2e)", "status": "affected"}, {"version": "15.2(2f)", "status": "affected"}, {"version": "15.2(2g)", "status": "affected"}, {"version": "15.2(2h)", "status": "affected"}, {"version": "15.2(3f)", "status": "affected"}, {"version": "15.2(3e)", "status": "affected"}, {"version": "15.2(3g)", "status": "affected"}, {"version": "15.2(4d)", "status": "affected"}, {"version": "15.2(4e)", "status": "affected"}, {"version": "15.2(5c)", "status": "affected"}, {"version": "15.2(5d)", "status": "affected"}, {"version": "16.0(1g)", "status": "affected"}, {"version": "15.2(5e)", "status": "affected"}, {"version": "15.2(4f)", "status": "affected"}, {"version": "15.2(6e)", "status": "affected"}, {"version": "15.2(6h)", "status": "affected"}, {"version": "16.0(1j)", "status": "affected"}, {"version": "15.2(6g)", "status": "affected"}, {"version": "15.2(7f)", "status": "affected"}, {"version": "15.2(7g)", "status": "affected"}, {"version": "16.0(2h)", "status": "affected"}, {"version": "15.2(8d)", "status": "affected"}, {"version": "16.0(2j)", "status": "affected"}, {"version": "15.2(8e)", "status": "affected"}, {"version": "16.0(3d)", "status": "affected"}, {"version": "16.0(3e)", "status": "affected"}, {"version": "15.2(8f)", "status": "affected"}, {"version": "15.2(8g)", "status": "affected"}, {"version": "15.3(1d)", "status": "affected"}, {"version": "15.2(8h)", "status": "affected"}, {"version": "16.0(4c)", "status": "affected"}, {"version": "15.3(2a)", "status": "affected"}, {"version": "15.2(8i)", "status": "affected"}, {"version": "16.0(5h)", "status": "affected"}, {"version": "15.3(2b)", "status": "affected"}, {"version": "16.0(3g)", "status": "affected"}, {"version": "16.0(5j)", "status": "affected"}, {"version": "15.3(2c)", "status": "affected"}, {"version": "16.0(6c)", "status": "affected"}, {"version": "15.3(2d)", "status": "affected"}, {"version": "16.1(1f)", "status": "affected"}, {"version": "16.0(7e)", "status": "affected"}, {"version": "16.0(8e)", "status": "affected"}, {"version": "15.3(2e)", "status": "affected"}, {"version": "16.0(8f)", "status": "affected"}, {"version": "16.1(2f)", "status": "affected"}, {"version": "16.1(2g)", "status": "affected"}, {"version": "15.3(2f)", "status": "affected"}, {"version": "16.0(9c)", "status": "affected"}, {"version": "16.1(3f)", "status": "affected"}, {"version": "16.0(9d)", "status": "affected"}, {"version": "16.0(6h)", "status": "affected"}, {"version": "16.0(8h)", "status": "affected"}, {"version": "16.1(3g)", "status": "affected"}, {"version": "16.0(9e)", "status": "affected"}, {"version": "16.1(4h)", "status": "affected"}], "defaultStatus": "unknown"}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-02-25T16:26:29.215Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-20033", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-02-25T18:18:01.739135Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-25T19:05:48.146Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficient validation when processing specific Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to the management interface of an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.\r\nNote: Only the out-of-band (OOB) management interface is affected."}], "id": "CVE-2026-20033", "lastModified": "2026-02-25T17:25:24.560", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Primary"}]}, "published": "2026-02-25T17:25:24.560", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-805"}], "source": "psirt@cisco.com", "type": "Primary"}]}

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