{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81558", "assignerOrgId": "db201096-a0cc-46c7-9a55-61d9e221bf01", "state": "PUBLISHED", "assignerShortName": "synology", "dateReserved": "2026-08-27T04:41:31.845Z", "datePublished": "2026-11-12T03:38:29.152Z", "dateUpdated": "2026-11-12T03:38:29.152Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "affected", "product": "DiskStation Manager (DSM)", "vendor": "Synology", "versions": [{"lessThan": "7.4.1-90080-1", "status": "affected", "version": "7.4.1", "versionType": "semver"}, {"lessThan": "7.3.2-86009-5", "status": "affected", "version": "7.3.2", "versionType": "semver"}, {"lessThan": "7.3.2", "status": "unknown", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Lubin Leclanche"}], "descriptions": [{"lang": "en", "value": "A missing authorization vulnerability in the SocketIo API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to write specific files."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "description": "Missing Authorization", "lang": "en", "type": "CWE"}]}], "references": [{"name": "Synology-SA-26:18 DSM", "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_18"}], "providerMetadata": {"orgId": "db201096-a0cc-46c7-9a55-61d9e221bf01", "shortName": "synology", "dateUpdated": "2026-11-12T03:38:29.152Z"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "affected", "product": "DiskStation Manager (DSM)", "vendor": "Synology", "versions": [{"lessThan": "7.4.1-90080-1", "status": "affected", "version": "7.4.1", "versionType": "semver"}, {"lessThan": "7.3.2-86009-5", "status": "affected", "version": "7.3.2", "versionType": "semver"}, {"lessThan": "7.3.2", "status": "unknown", "version": "0", "versionType": "semver"}]}], "source": "security@synology.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A missing authorization vulnerability in the SocketIo API in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote authenticated users to write specific files."}], "id": "CVE-2026-81558", "lastModified": "2026-11-12T04:17:20.890", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security@synology.com", "type": "Primary"}]}, "published": "2026-11-12T04:17:20.890", "references": [{"source": "security@synology.com", "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_18"}], "sourceIdentifier": "security@synology.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security@synology.com", "type": "Primary"}]}

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