{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-20010",
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "state": "PUBLISHED",
        "assignerShortName": "cisco",
        "dateReserved": "2025-10-08T11:59:15.350Z",
        "datePublished": "2026-02-25T16:18:14.561Z",
        "dateUpdated": "2026-02-25T19:05:49.108Z"
    },
    "containers": {
        "cna": {
            "title": "Cisco Nexus 3000 and 9000 Series Switches Link Layer Discovery Protocol 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 Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the LLDP process to restart, which could cause an affected device to reload unexpectedly.\r\n\r\nThis vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.\r\nNote: LLDP is a Layer 2 link protocol. To exploit this vulnerability, an attacker would need to be directly connected to an interface of an affected device, either physically or logically (for example, through a Layer 2 Tunnel configured to transport the LLDP protocol)."
                }
            ],
            "references": [
                {
                    "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n3kn9k_aci_lldp_dos-NdgRrrA3",
                    "name": "cisco-sa-n3kn9k_aci_lldp_dos-NdgRrrA3"
                }
            ],
            "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-n3kn9k_aci_lldp_dos-NdgRrrA3",
                "discovery": "EXTERNAL",
                "defects": [
                    "CSCwq33193"
                ]
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Buffer Access with Incorrect Length Value",
                            "type": "cwe",
                            "cweId": "CWE-805"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Cisco",
                    "product": "Cisco NX-OS Software",
                    "versions": [
                        {
                            "version": "10.3(1)",
                            "status": "affected"
                        },
                        {
                            "version": "10.3(2)",
                            "status": "affected"
                        },
                        {
                            "version": "10.3(3)",
                            "status": "affected"
                        },
                        {
                            "version": "10.4(1)",
                            "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": "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": "10.3(3x)",
                            "status": "affected"
                        },
                        {
                            "version": "10.3(4g)",
                            "status": "affected"
                        },
                        {
                            "version": "10.3(3r)",
                            "status": "affected"
                        },
                        {
                            "version": "10.3(4h)",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Cisco",
                    "product": "Cisco NX-OS System Software in ACI Mode",
                    "versions": [
                        {
                            "version": "16.0(2h)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(2j)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(3d)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(3e)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(4c)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(5h)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(3g)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(5j)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(6c)",
                            "status": "affected"
                        },
                        {
                            "version": "16.1(1f)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(7e)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(8e)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(8f)",
                            "status": "affected"
                        },
                        {
                            "version": "16.1(2f)",
                            "status": "affected"
                        },
                        {
                            "version": "16.1(2g)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(9c)",
                            "status": "affected"
                        },
                        {
                            "version": "16.1(3f)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(9d)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(6h)",
                            "status": "affected"
                        },
                        {
                            "version": "16.0(8h)",
                            "status": "affected"
                        },
                        {
                            "version": "16.1(3g)",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Cisco",
                    "product": "Cisco Unified Computing System (Managed)",
                    "versions": [
                        {
                            "version": "4.3(4e)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(6b)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(4c)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(4f)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(6d)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(5e)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(4d)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(4b)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(5a)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(5c)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(5d)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(6c)",
                            "status": "affected"
                        },
                        {
                            "version": "4.3(6a)",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }
            ],
            "providerMetadata": {
                "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
                "shortName": "cisco",
                "dateUpdated": "2026-02-25T16:18:14.561Z"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-20010",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-02-25T18:18:44.628066Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-02-25T19:05:49.108Z"
                }
            }
        ]
    }
}