{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-52856",
        "assignerOrgId": "2fd009eb-170a-4625-932b-17a53af1051f",
        "state": "PUBLISHED",
        "assignerShortName": "qnap",
        "dateReserved": "2025-06-20T05:51:57.033Z",
        "datePublished": "2025-08-29T17:17:20.562Z",
        "dateUpdated": "2026-02-26T17:47:47.567Z"
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                    "defaultStatus": "unaffected",
                    "product": "VioStor",
                    "vendor": "QNAP Systems Inc.",
                    "versions": [
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                            "status": "affected",
                            "version": "5.1.0",
                            "versionType": "custom"
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            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "360 的安全研究员 侯留洋（houliuyang@360.cn）"
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                            "value": "An improper authentication vulnerability has been reported to affect VioStor. If a remote attacker, they can then exploit the vulnerability to compromise the security of the system.<br><br>We have already fixed the vulnerability in the following version:<br>VioStor 5.1.6 build 20250621 and later<br>"
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                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-115",
                    "descriptions": [
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                            "value": "CAPEC-115"
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                    ]
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            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "HIGH",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
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            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "description": "CWE-287",
                            "lang": "en",
                            "type": "CWE"
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                    ]
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            ],
            "providerMetadata": {
                "orgId": "2fd009eb-170a-4625-932b-17a53af1051f",
                "shortName": "qnap",
                "dateUpdated": "2025-08-29T17:17:20.562Z"
            },
            "references": [
                {
                    "url": "https://www.qnap.com/en/security-advisory/qsa-25-29"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "We have already fixed the vulnerability in the following version:<br>VioStor 5.1.6 build 20250621 and later<br>"
                        }
                    ],
                    "value": "We have already fixed the vulnerability in the following version:\nVioStor 5.1.6 build 20250621 and later"
                }
            ],
            "source": {
                "advisory": "QSA-25-29",
                "discovery": "EXTERNAL"
            },
            "title": "VioStor",
            "x_generator": {
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        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2025-52856",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2025-08-30T03:55:41.446280Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-02-26T17:47:47.567Z"
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}