{"id":"CVE-2025-20262","state":"PUBLISHED","title":"Cisco Nexus 3000 and 9000 Series Switches Protocol Independent Multicast Version 6 Denial of Service Vulnerability","description":"A vulnerability in the Protocol Independent Multicast Version 6 (PIM6) feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an authenticated, low-privileged, remote attacker to trigger a crash of the PIM6 process, resulting in a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to improper processing of PIM6 ephemeral data queries. An attacker could exploit this vulnerability by sending a crafted ephemeral query to an affected device through one of the following methods: NX-API REST, NETCONF, RESTConf, gRPC, or Model Driven Telemetry. A successful exploit could allow the attacker to cause the PIM6 process to crash and restart, causing potential adjacency flaps and resulting in a DoS of the PIM6 and ephemeral query processes.","publishedAt":"2025-08-27T16:23:46.232Z","updatedAt":"2025-08-27T18:19:53.930Z","severity":{"score":5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco NX-OS Software"],"affected":[{"vendor":"Cisco","product":"Cisco NX-OS Software","defaultStatus":"unknown","versions":[{"version":"9.2(3)","status":"affected"},{"version":"9.2(2v)","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":"9.2(4)","status":"affected"},{"version":"9.3(1)","status":"affected"},{"version":"9.3(1z)","status":"affected"},{"version":"9.2(2)","status":"affected"},{"version":"9.3(3)","status":"affected"},{"version":"9.3(4)","status":"affected"},{"version":"9.3(5)","status":"affected"},{"version":"9.3(6)","status":"affected"},{"version":"10.1(2)","status":"affected"},{"version":"10.1(1)","status":"affected"},{"version":"9.3(5w)","status":"affected"},{"version":"9.3(7)","status":"affected"},{"version":"9.3(7k)","status":"affected"},{"version":"10.2(1)","status":"affected"},{"version":"9.3(7a)","status":"affected"},{"version":"9.3(8)","status":"affected"},{"version":"10.2(1q)","status":"affected"},{"version":"10.2(2)","status":"affected"},{"version":"9.3(9)","status":"affected"},{"version":"10.1(2t)","status":"affected"},{"version":"10.2(3)","status":"affected"},{"version":"10.2(3t)","status":"affected"},{"version":"9.3(10)","status":"affected"},{"version":"10.2(2a)","status":"affected"},{"version":"10.3(1)","status":"affected"},{"version":"10.2(4)","status":"affected"},{"version":"10.3(2)","status":"affected"},{"version":"9.3(11)","status":"affected"},{"version":"10.3(3)","status":"affected"},{"version":"10.2(5)","status":"affected"},{"version":"9.3(12)","status":"affected"},{"version":"10.2(3v)","status":"affected"},{"version":"10.4(1)","status":"affected"},{"version":"10.3(99w)","status":"affected"},{"version":"10.2(6)","status":"affected"},{"version":"10.3(3w)","status":"affected"},{"version":"10.3(99x)","status":"affected"},{"version":"10.3(3o)","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":"10.3(5)","status":"affected"},{"version":"10.2(7)","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":"10.2(8)","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":"10.4(4g)","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxospc-pim6-vG4jFPh"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/20xxx/CVE-2025-20262.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-20262","state":"PUBLISHED","datePublished":"2025-08-27T16:23:46.232Z","dateUpdated":"2025-08-27T18:19:53.930Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2024-10-10T19:15:13.243Z"},"containers":{"cna":{"title":"Cisco Nexus 3000 and 9000 Series Switches Protocol Independent Multicast Version 6 Denial of Service Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the Protocol Independent Multicast Version 6 (PIM6) feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an authenticated, low-privileged, remote attacker to trigger a crash of the PIM6 process, resulting in a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to improper processing of PIM6 ephemeral data queries. An attacker could exploit this vulnerability by sending a crafted ephemeral query to an affected device through one of the following methods: NX-API REST, NETCONF, RESTConf, gRPC, or Model Driven Telemetry. A successful exploit could allow the attacker to cause the PIM6 process to crash and restart, causing potential adjacency flaps and resulting in a DoS of the PIM6 and ephemeral query processes."}],"affected":[{"vendor":"Cisco","product":"Cisco NX-OS Software","defaultStatus":"unknown","versions":[{"version":"9.2(3)","status":"affected"},{"version":"9.2(2v)","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":"9.2(4)","status":"affected"},{"version":"9.3(1)","status":"affected"},{"version":"9.3(1z)","status":"affected"},{"version":"9.2(2)","status":"affected"},{"version":"9.3(3)","status":"affected"},{"version":"9.3(4)","status":"affected"},{"version":"9.3(5)","status":"affected"},{"version":"9.3(6)","status":"affected"},{"version":"10.1(2)","status":"affected"},{"version":"10.1(1)","status":"affected"},{"version":"9.3(5w)","status":"affected"},{"version":"9.3(7)","status":"affected"},{"version":"9.3(7k)","status":"affected"},{"version":"10.2(1)","status":"affected"},{"version":"9.3(7a)","status":"affected"},{"version":"9.3(8)","status":"affected"},{"version":"10.2(1q)","status":"affected"},{"version":"10.2(2)","status":"affected"},{"version":"9.3(9)","status":"affected"},{"version":"10.1(2t)","status":"affected"},{"version":"10.2(3)","status":"affected"},{"version":"10.2(3t)","status":"affected"},{"version":"9.3(10)","status":"affected"},{"version":"10.2(2a)","status":"affected"},{"version":"10.3(1)","status":"affected"},{"version":"10.2(4)","status":"affected"},{"version":"10.3(2)","status":"affected"},{"version":"9.3(11)","status":"affected"},{"version":"10.3(3)","status":"affected"},{"version":"10.2(5)","status":"affected"},{"version":"9.3(12)","status":"affected"},{"version":"10.2(3v)","status":"affected"},{"version":"10.4(1)","status":"affected"},{"version":"10.3(99w)","status":"affected"},{"version":"10.2(6)","status":"affected"},{"version":"10.3(3w)","status":"affected"},{"version":"10.3(99x)","status":"affected"},{"version":"10.3(3o)","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":"10.3(5)","status":"affected"},{"version":"10.2(7)","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":"10.2(8)","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":"10.4(4g)","status":"affected"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxospc-pim6-vG4jFPh","name":"cisco-sa-nxospc-pim6-vG4jFPh"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L","baseScore":5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"NULL Pointer Dereference","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2025-08-27T16:23:46.232Z"},"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-nxospc-pim6-vG4jFPh","discovery":"INTERNAL","defects":["CSCwn69044"]}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-27T18:19:06.153576Z","id":"CVE-2025-20262","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-08-27T18:19:53.930Z"}}]}}}