{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2025-20241",
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "state": "PUBLISHED",
        "assignerShortName": "cisco",
        "dateReserved": "2024-10-10T19:15:13.238Z",
        "datePublished": "2025-08-27T16:23:55.242Z",
        "dateUpdated": "2025-08-27T18:18:32.250Z"
    },
    "containers": {
        "cna": {
            "title": "Cisco Nexus 3000 and 9000 Series Switches IS-IS Protocol <TBD> 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 the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload.\r\n\r\nThis vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition.\r\nNote: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device."
                }
            ],
            "references": [
                {
                    "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n39k-isis-dos-JhJA8Rfx",
                    "name": "cisco-sa-n39k-isis-dos-JhJA8Rfx"
                }
            ],
            "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-n39k-isis-dos-JhJA8Rfx",
                "discovery": "INTERNAL",
                "defects": [
                    "CSCwn49153"
                ]
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Compiler Optimization Removal or Modification of Security-critical Code",
                            "type": "cwe",
                            "cweId": "CWE-733"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Cisco",
                    "product": "Cisco NX-OS Software",
                    "versions": [
                        {
                            "version": "9.2(3)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I5(2)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(7a)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(5)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(6)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(3)",
                            "status": "affected"
                        },
                        {
                            "version": "9.2(2v)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(7)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(1)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(8)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(2)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(11)",
                            "status": "affected"
                        },
                        {
                            "version": "9.2(1)",
                            "status": "affected"
                        },
                        {
                            "version": "9.2(2t)",
                            "status": "affected"
                        },
                        {
                            "version": "9.2(3y)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(1t)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(6z)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(3)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(3z)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)IM7(2)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(11b)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(5a)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I6(1)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I5(3b)",
                            "status": "affected"
                        },
                        {
                            "version": "9.2(4)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(10)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)IC4(4)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(3c)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(1)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(5)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I5(3)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(3)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(6)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I6(2)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(5)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(1)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(7)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(6)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(11a)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(8z)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(9)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(4)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(7)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(9)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(1)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(10a)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I5(1)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(1z)",
                            "status": "affected"
                        },
                        {
                            "version": "9.2(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(4)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(8b)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(3)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(6t)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I5(3a)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(8)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(5)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(3a)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(4)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(8a)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)F3(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I4(4)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(1)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)IA7(2)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)IA7(1)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(7b)",
                            "status": "affected"
                        },
                        {
                            "version": "6.0(2)A8(4a)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(3)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(8)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(4)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(5)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(9)",
                            "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": "7.0(3)I7(9w)",
                            "status": "affected"
                        },
                        {
                            "version": "10.2(1)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(7a)",
                            "status": "affected"
                        },
                        {
                            "version": "9.3(8)",
                            "status": "affected"
                        },
                        {
                            "version": "7.0(3)I7(10)",
                            "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"
                        },
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                            "version": "10.4(2)",
                            "status": "affected"
                        },
                        {
                            "version": "10.3(3q)",
                            "status": "affected"
                        },
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                            "version": "9.3(13)",
                            "status": "affected"
                        },
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                            "version": "10.3(5)",
                            "status": "affected"
                        },
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                            "version": "10.2(7)",
                            "status": "affected"
                        },
                        {
                            "version": "10.4(3)",
                            "status": "affected"
                        },
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                            "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"
                        }
                    ],
                    "defaultStatus": "unknown"
                }
            ],
            "providerMetadata": {
                "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
                "shortName": "cisco",
                "dateUpdated": "2025-08-27T16:23:55.242Z"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-08-27T18:18:19.522793Z",
                                "id": "CVE-2025-20241",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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}