{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20173","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.392Z","datePublished":"2026-10-07T16:12:04.505Z","dateUpdated":"2026-10-07T17:42:39.672Z"},"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:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","baseScore":5.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}}],"descriptions":[{"lang":"en","value":"A vulnerability in Cisco NX-OS Software could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition.\r\n\r\nThis vulnerability exists because rate limiting was improperly applied to some protocols. An attacker could exploit this vulnerability by sending a high rate of UDP or TCP connections to a data plane interface on an affected device. A successful exploit could allow the attacker to cause instability to various routing and control plane protocols through some packet loss and temporary disruptions, causing a DoS condition. This DoS condition will clear without manual intervention soon after the high rate of traffic is stopped."}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7","name":"cisco-sa-nxos-nscpdos-SnderkC7"}],"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-nscpdos-SnderkC7","discovery":"EXTERNAL","defects":["CSCws28832"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Allocation of Resources Without Limits or Throttling","type":"cwe","cweId":"CWE-770"}]}],"affected":[{"vendor":"Cisco","product":"Cisco NX-OS Software","versions":[{"version":"8.2(5)","status":"affected"},{"version":"7.3(5)D1(1)","status":"affected"},{"version":"8.4(2)","status":"affected"},{"version":"8.4(3)","status":"affected"},{"version":"9.2(3)","status":"affected"},{"version":"9.2(2v)","status":"affected"},{"version":"7.3(4)D1(1)","status":"affected"},{"version":"8.2(1)","status":"affected"},{"version":"9.2(1)","status":"affected"},{"version":"9.2(2t)","status":"affected"},{"version":"9.2(3y)","status":"affected"},{"version":"9.3(2)","status":"affected"},{"version":"8.1(1)","status":"affected"},{"version":"8.2(2)","status":"affected"},{"version":"8.3(2)","status":"affected"},{"version":"7.3(2)D1(3a)","status":"affected"},{"version":"9.2(4)","status":"affected"},{"version":"8.1(2)","status":"affected"},{"version":"7.3(3)D1(1)","status":"affected"},{"version":"8.2(3)","status":"affected"},{"version":"8.4(1)","status":"affected"},{"version":"7.3(0)DX(1)","status":"affected"},{"version":"7.3(2)D1(1)","status":"affected"},{"version":"9.3(1)","status":"affected"},{"version":"7.3(2)D1(2)","status":"affected"},{"version":"8.2(4)","status":"affected"},{"version":"9.3(1z)","status":"affected"},{"version":"9.2(2)","status":"affected"},{"version":"8.1(2a)","status":"affected"},{"version":"7.3(2)D1(3)","status":"affected"},{"version":"8.3(1)","status":"affected"},{"version":"7.3(1)D1(1)","status":"affected"},{"version":"7.3(0)D1(1)","status":"affected"},{"version":"9.3(3)","status":"affected"},{"version":"7.3(2)D1(1d)","status":"affected"},{"version":"9.3(4)","status":"affected"},{"version":"7.3(6)D1(1)","status":"affected"},{"version":"8.2(6)","status":"affected"},{"version":"9.3(5)","status":"affected"},{"version":"9.3(6)","status":"affected"},{"version":"8.4(4)","status":"affected"},{"version":"7.3(7)D1(1)","status":"affected"},{"version":"9.3(5w)","status":"affected"},{"version":"8.2(7)","status":"affected"},{"version":"9.3(7)","status":"affected"},{"version":"9.3(7k)","status":"affected"},{"version":"7.3(8)D1(1)","status":"affected"},{"version":"9.3(7a)","status":"affected"},{"version":"8.2(7a)","status":"affected"},{"version":"9.3(8)","status":"affected"},{"version":"8.4(4a)","status":"affected"},{"version":"8.4(5)","status":"affected"},{"version":"8.2(8)","status":"affected"},{"version":"9.3(9)","status":"affected"},{"version":"7.3(9)D1(1)","status":"affected"},{"version":"8.4(6)","status":"affected"},{"version":"9.3(10)","status":"affected"},{"version":"8.2(9)","status":"affected"},{"version":"10.3(1)","status":"affected"},{"version":"8.4(7)","status":"affected"},{"version":"10.3(2)","status":"affected"},{"version":"8.4(6a)","status":"affected"},{"version":"9.3(11)","status":"affected"},{"version":"10.3(3)","status":"affected"},{"version":"8.2(10)","status":"affected"},{"version":"9.3(12)","status":"affected"},{"version":"10.4(1)","status":"affected"},{"version":"8.4(8)","status":"affected"},{"version":"10.3(99w)","status":"affected"},{"version":"10.3(3w)","status":"affected"},{"version":"10.3(99x)","status":"affected"},{"version":"10.3(3o)","status":"affected"},{"version":"8.4(9)","status":"affected"},{"version":"10.3(4)","status":"affected"},{"version":"10.3(3p)","status":"affected"},{"version":"10.3(4a)","status":"affected"},{"version":"10.4(2)","status":"affected"},{"version":"10.3(3q)","status":"affected"},{"version":"9.3(13)","status":"affected"},{"version":"8.2(11)","status":"affected"},{"version":"10.3(5)","status":"affected"},{"version":"10.4(3)","status":"affected"},{"version":"10.3(3x)","status":"affected"},{"version":"10.3(4g)","status":"affected"},{"version":"10.5(1)","status":"affected"},{"version":"8.4(10)","status":"affected"},{"version":"10.3(3r)","status":"affected"},{"version":"10.3(6)","status":"affected"},{"version":"9.3(14)","status":"affected"},{"version":"10.4(4)","status":"affected"},{"version":"10.3(4h)","status":"affected"},{"version":"10.5(2)","status":"affected"},{"version":"8.4(11)","status":"affected"},{"version":"10.3(7)","status":"affected"},{"version":"10.4(5)","status":"affected"},{"version":"10.5(3)","status":"affected"},{"version":"9.3(15)","status":"affected"},{"version":"10.4(4g)","status":"affected"},{"version":"10.5(4)","status":"affected"},{"version":"8.4(12)","status":"affected"},{"version":"10.5(3t)","status":"affected"},{"version":"10.3(8)","status":"affected"},{"version":"10.4(6)","status":"affected"},{"version":"10.5(3s)","status":"affected"},{"version":"10.5(3e)","status":"affected"},{"version":"10.5(3o)","status":"affected"},{"version":"9.3(16)","status":"affected"},{"version":"10.5(3p)","status":"affected"},{"version":"10.4(7)","status":"affected"},{"version":"10.5(5)","status":"affected"},{"version":"9.3(17)","status":"affected"}],"defaultStatus":"unknown"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-10-07T16:12:04.505Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-07T17:42:18.044011Z","id":"CVE-2026-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Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-07T17:42:39.672Z"}}]}}