{"id":"CVE-2026-20173","revision":null,"records":[{"revision":"2a5a2160b34449ed8e6b24d908e0ae11","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-20173","aliases":[],"title":"Cisco NX-OS Software Denial of Service Vulnerability","description":"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.","state":0,"publishedAt":"2026-10-07T16:12:04.505+00:00","modifiedAt":"2026-10-07T17:42:39.672+00:00","affected":[{"ecosystem":"Vendor product","name":"Cisco NX-OS Software","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"vendor\": \"Cisco\",\n \"product\": \"Cisco NX-OS Software\",\n \"versions\": [\n {\n \"version\": \"8.2(5)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"7.3(5)D1(1)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"8.4(2)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"8.4(3)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"9.2(3)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"9.2(2v)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"7.3(4)D1(1)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"8.2(1)\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"9.2(1)\",\n \"status\": \"affected\"\n },\n {\n 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