{"schemaVersion":3,"id":"CVE-2026-20033","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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.\n\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.\nNote: Only the out-of-band (OOB) management interface is affected.","dates":{"published":"2026-02-25T16:26:29.215Z","modified":"2026-02-25T19:05:48.146Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.4,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00157,"percentile":0.04461,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":-0.0010000000000000026,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00158},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00157,"percentile":0.04461}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00158,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00166,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00157,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00157,"percentile":0.04461}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-805","name":"Buffer Access with Incorrect Length Value","description":"The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/805.html"}],"affected":[{"vendor":"cisco","product":"cisco nx-os system software in aci mode","name":"Cisco NX-OS System Software in ACI Mode","label":"cisco nx-os system software in aci mode","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"15.2(1g)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(2e)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(2f)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(2g)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(2h)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(3f)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(3e)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(3g)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(4d)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(4e)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(5c)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(5d)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(1g)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(5e)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(4f)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(6e)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(6h)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(1j)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(6g)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(7f)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(7g)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(2h)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(8d)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(2j)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(8e)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(3d)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(3e)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(8f)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(8g)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(1d)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(8h)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(4c)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(2a)","noFixRecorded":false,"fixedIn":null},{"text":"15.2(8i)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(5h)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(2b)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(3g)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(5j)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(2c)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(6c)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(2d)","noFixRecorded":false,"fixedIn":null},{"text":"16.1(1f)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(7e)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(8e)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(2e)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(8f)","noFixRecorded":false,"fixedIn":null},{"text":"16.1(2f)","noFixRecorded":false,"fixedIn":null},{"text":"16.1(2g)","noFixRecorded":false,"fixedIn":null},{"text":"15.3(2f)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(9c)","noFixRecorded":false,"fixedIn":null},{"text":"16.1(3f)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(9d)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(6h)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(8h)","noFixRecorded":false,"fixedIn":null},{"text":"16.1(3g)","noFixRecorded":false,"fixedIn":null},{"text":"16.0(9e)","noFixRecorded":false,"fixedIn":null},{"text":"16.1(4h)","noFixRecorded":false,"fixedIn":null}],"versionsText":"15.2(1g) | 15.2(2e) | 15.2(2f) | 15.2(2g) | 15.2(2h) | 15.2(3f) | 15.2(3e) | 15.2(3g) | 15.2(4d) | 15.2(4e) | 15.2(5c) | 15.2(5d) | 16.0(1g) | 15.2(5e) | 15.2(4f) | 15.2(6e) | 15.2(6h) | 16.0(1j) | 15.2(6g) | 15.2(7f) | 15.2(7g) | 16.0(2h) | 15.2(8d) | 16.0(2j) | 15.2(8e) | 16.0(3d) | 16.0(3e) | 15.2(8f) | 15.2(8g) | 15.3(1d) | 15.2(8h) | 16.0(4c) | 15.3(2a) | 15.2(8i) | 16.0(5h) | 15.3(2b) | 16.0(3g) | 16.0(5j) | 15.3(2c) | 16.0(6c) | 15.3(2d) | 16.1(1f) | 16.0(7e) | 16.0(8e) | 15.3(2e) | 16.0(8f) | 16.1(2f) | 16.1(2g) | 15.3(2f) | 16.0(9c) | 16.1(3f) | 16.0(9d) | 16.0(6h) | 16.0(8h) | 16.1(3g) | 16.0(9e) | 16.1(4h)","eol":null,"hubHref":"/vendor/cisco/cisco_nx-os_system_software_in_aci_mode"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD","label":"sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD","hostname":"sec.cloudapps.cisco.com","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-02-25T16:26:29.215Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-25T19:05:48.146Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:39:46.756Z","stale":false,"partial":false}}