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    "cveMetadata": {
        "cveId": "CVE-2021-47664",
        "assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c",
        "state": "PUBLISHED",
        "assignerShortName": "CERTVDE",
        "dateReserved": "2025-03-17T08:25:16.736Z",
        "datePublished": "2025-04-24T09:25:39.181Z",
        "dateUpdated": "2025-04-24T15:22:17.000Z"
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                    "defaultStatus": "unaffected",
                    "product": "Franka Emika Robot",
                    "vendor": "Franka Robotics",
                    "versions": [
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                            "lessThanOrEqual": "4.0.3",
                            "status": "affected",
                            "version": "0.0.0",
                            "versionType": "semver"
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            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "user": "00000000-0000-4000-9000-000000000000",
                    "value": "Siegfried Hollerer by TU Wien"
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                            "value": "Due to improper authentication mechanism an unauthenticated remote attacker can enumerate valid usernames."
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            "metrics": [
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                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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                    "descriptions": [
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                            "cweId": "CWE-203",
                            "description": "CWE-203: Observable Discrepancy",
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            "references": [
                {
                    "url": "https://www.sciencedirect.com/science/article/pii/S2351978921001657"
                }
            ],
            "source": {
                "defect": [
                    "CERT@VDE#641761"
                ],
                "discovery": "UNKNOWN"
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            "title": "Enumeration of valid user names",
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            {
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-04-24T13:46:45.931265Z",
                                "id": "CVE-2021-47664",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Automatable": "yes"
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                                        "Technical Impact": "partial"
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                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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